Mod Bus Amount threshhold problem

I’ve got a MMV Signature #144 (in case this was fixed in later ones).

I find that the modulation busses don’t ‘kick in’ until you’ve turned the amount to ‘2’ (or about 20 on the screen parameter). The difference between 0 and 20 is negligable, but then all of a sudden it starts working really stongly.

Has anyone else noticed this? If you want to have a really subtile vibrato for example, it’s really hard to get going with just the mod bus as is.

What is the position of the Mod Wheel when you do this? If it’s low, you might not have enough resolution (?).

If the knob is anywhere between 0 and 2, then it does nothing. As soon as you go right past 2… then boom, there it is.