I'm in the same boat (bad encoder), what is the part number for the Mk2a rotory encoder? (my searching skills apparently are not as good as yours, sensei.)

I just IM'ed Mark Lord about getting one (cause I did find that thread)... and I didn't want to bother Rob about it...

Won't the old knob work with some "electrical tape" molding to fill in the gaps? or is the post bigger in spots?

Thanks!
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Ryan here... Empeg [08000462] 40 Gig with Subaru WRX sport wagon attached... (still! pending memory + LED upgrade, sheesh, I've been sitting on my ass for years)