If so, how many rack units does it require?
I believe that the rackmount kit takes up three rack units…at least, if my math is correct. The MoogerFooger rack mount can fit four CP-251’s, and is six rack units, so it only makes sense that the VX-351/CP-251 rack kit would be three rack units. 
I’m using a rack-mounted CP-251 using the VX-351/CP-251rack kit ~
3U “tall”
3U tall, though the wooden end pieces are a little too long. You may have to remove them depending on what you have above or below them.
Stephen
.
The official CP/VX rack mount kit includes a wooden block that you use between the two units and I’m guessing that it’s height (oriented in the rack) is shaved just a bit shy of the normal end cheeks. (I bought the kit but mine didn’t come with the block of wood for some reason!).
But proper mounting requires that you take off the end cheeks closest to your rack rails.
Unless you actually need to mount 2 x CP251 and have an RME with VX-351 and VX-352 you should just get the CP/VX rack mount kit and avoid the MF kit.
FYI -
You may also need to relocate the jack for the CP-251 AC adapter to a mounting hole in the bottom of the CP-251.
Not a big deal, actually - the rack kit and the CP-251 already have the provisions needed.
I’d love to see what one could do with 4 CP251s! Probably overkill, but if you had all the MFs, then it’d be nice to dedicate 2 units to 1 CP251, and then you’d have a better organisation of cables and MFs.
Overkill? Maybe. Then again I’ve always been one for overkill. I LOVE overkill! For example, run four LFO’s into the mixer of one CP-251 and use the resulting waveform for modulation! 
I’m trying to rack mine vertically in a MF rack kit. Im figuring im gonna have to drill holes in the kit panel? I’d like to avoid that as possible, but am really trying to maximize my rack space…
Also, i figure i’d need to reroute the PSU outlet to the rear. is there anyway of doing that without buying that $18 CP251 MF rack kit? Any advice would be awesome.
Thanks
I mounted my gear in a $30 On Stage vertical (open) rack from Sweetwater.
Works great - the open rack is great for patching!!
The CP/VX rack mount has the provisions to support moving the CP-251 PS jack to the rear ~ no drilling required.
Here’s my “Dark Moog Semi Modular” assembled in the On Stage Rack:
http://forum.moogmusic.com/viewtopic.php?f=1&t=12969&start=765#p116812
This pic shows how i wanna setup my cp-251, vertical, positioned next to 2 other foogers. I jur finished building my own fooger rack & i eant tk be utilizin every bit of space i have…
Cant upload the pic, but basically its posted vertically so its relatively in-line next to 2 other foogers
Someone correct me if I’m wrong, but I’m pretty sure you can move the CP-251’s power plug to the rear without any kit. If you open her up (power unplugged of course), you should be able to simply swap the plastic cap (originally in the rear slot) and the power plug (originally in the side slot) over. If I recall correctly, the internal power cable isn’t very long 
so it’s quite tight to re-connect to the housing again, but not really a problem. Note: make sure the internal power cable is still properly connected to the circuit board before you reassemble and close her up.
Regards,
David
NZ
Correct -
The bottom case already has a hole in it for mounting the PS jack, if needed ~
but there’s not a lot of wire to work with on the PS jack!
Other than the short wire length, swapping the PS jack from the back panel to the bottom panel is pretty straight forward.
The CP/VX mount already has all the correct mounting holes needed to mount the CP, including holes to mount the PS jack on the bottom.
Haven’t tried using the CP with the 3-unit MF rack, so I don’t know for sure about that one…
Can anyone tell me, does MF Rack kit comes with wood kit for the middle fooger (2 wood cheeks to mount them between the middle fooger and side foogers) ?
I now if you are lucky you get this with CP kit, but I’m not sure.
If not, then the middle fooger is not protected, as I’ve seen pics of racked foogers with some space between the middle one and others.
That just sucks.
I would love to build a 3 door rack with adjustable upper compartment with MFs and CPs and some FX racks under that, but I just don’t want to spend 175 euros on just rack kit and without wood kit. I can do it by myself, but I don’t understand the price of the rack kit. It is just a pice of metal with holes.
If I compare a 3 door Thon rack that is 6U with mounting on front, back and adjustable top angle for about 230 euros and compare this to MF and CP mounting kit, I must say that this is expensive pice of metal!
Is there a alternative to MF rack kit?
I can drill holes and paint myself.
Any suggestions?
I have both the CP kit and the MF kit ~
Both include the required mounting hardware.
The CP kit includes wooden inserts to fit between units.
The MF kit is designed so the sides should be removed from the center Fooger.
It still makes for a close fit, and you have to be looking closely to notice any gap around the middle Fooger.
They are a bit pricey, but it is nice to have sturdy mounts that are custom made and drilled to fit the Moog gear.
Randy
Hi
I’d like to know if we can use the CP kit for one Minitaur and one CP251
Thanks
Unfortunately, not without some modifications.
The Minitaur isn’t really oriented (or sized) to mount flush in a flat mount like the CP kit.
The Minitaur is designed to mount in a rack using “ear” mounting brackets that attach at adjustable angles on the ends of the synth.
You might be able to use the CP mount using industrial-strength velcro, but the Minitaur would still be at a weird viewing angle compared to the CP-251. Anything else would require some drilling and possibly other modifications to the CP kit and Minitaur.
Thank you for your answer Stuka.
Hi, a little late I know but yes it is possible - I did it with the cp rack kit. Needed to use a circular saw to cut a section out of the back of the steel rack so that the front of the MT sat flush with the CP251, then with a little trial and error was able to screw one side into the holes on the side of the MT. Its not perfect but it was worth the hack to get the MT and the CP251 racked up together. If you want more info, please get in touch.