[sdiy] simple knob question...

[Matthew W. Russell]

Is there a standard size for the shaft of a knob?  I have an opportunity 
to get some very cheap knobs, with an 1/8" shaft, but I don't know 
enough to determine whether they'll work with the project I plan on 
using them on... (doing a MidiBox to learn about that sort of thing)

Also, semi-unrelated... anyone know if MidiBox works with rotary 
encoders?  (I know they have a forum, but figured I'd tag it on here anyway)

Thanks!