#2
its just the physical size of the pot. no real differance.
Quote by Scowmoo




You deserved this, Matt.
#3
but which one will fit regular knobs? is the shaft size the same? i just want to make sure it will fit regular knobs.

also,



the "DRIVE" pot on the schem. 1k L - the L means linear right? and what does N.C. mean at the 1st lug of the pot?
#4
The shafts should be the same size. Sometimes the larger pot may not fit if your trying to fit 3 in a small enclosure. The N.C. means no connection as in no wire connected to that lug.