crumar / roland questions.

[BonoVox9 at aol.com]

Hello every body.

my sponge for brain is soaking in more and more of this synth stuff as the 
weeks pass and i have yet another set of two questions to put upon you.

I think they're pretty easy to answer, but, I can't answer them. I'm just 
asking for a little advice/opinion.

I recently purchased a Roland RS-09, and it's missing the main volume knob. 
The pot is there, but, no knob. This keyboard is from the same era as the 
sh-09, I think. The design is similar. 
What I would like to know is, if it is possible to find the volume knob that 
goes on it? Sometimes I hear about people finding parts for their TR-808 or 
whatever from Roland, so, maybe they have some of these? Or does anybody have 
one that they'd like to sell? 

Second question....

I have a crumar peformer, I've bugged you all before about it, but, I have 
another little problem. The tuning pot in the back is a piece of junk. I 
cannot get it to 440. It seems to "jump" pitches instead of glide when I turn 
it. I can get it to just about 440, and then i turn it just a little bit 
more, and the pitch just sort of jumps up a little above 440. I can't explain 
it very well. I don't think that it's dirty, I think that's just how it is. I 
wanted to ask if anybody knew if there was something I could replace it with. 
If there was a pot that would work better and would be compatible. 

If anybody has any suggestions, I would appreciate them very much.

Thank you.
Jason.