{Collins} KWM-1 Plug ins ?Stability?

I'm looking for an extra crystal plug in for the KWM-1, either a repro or 
actual, and the DX adapter.  If anyone has one for sale, or info on making you 
own, I'd be very happy to hear from them.
Also, I notice some PTO drift in my M-!, which dissappears with the lid open. 
 Is this normal, and if it is, is there a way to remedy it short of a fan or 
keeping the lid up?

Thanks, Scott

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