Emu XL-7 & MP-7 User's Group

I have problems with the data wheel. I sent back my last XL-7 because 
the data wheel was buggy. When I turned it sometimes it did strange 
things. When trying to change pattern or anything, it would 
suddenly "jump" to a completley different value (And I know I didn't 
turn the wheel that fast).

I got a new XL-7 and had no problem with it. The data wheel was 
acting nice 'n smooth, no unexpected "jumps". Until now. A while ago 
I noticed the data wheel on the new XL-7 started to act a little bit 
weird. And now it's quite bad again, like the last XL-7.

Must be quite low quality components or something? This never 
happends to my other synthesizers.

I just want to know how the data wheel is for the others of you?

//Nifflas