[sdiy] Appropriate knob size for Fracrack modules?

[Scott Juskiw]

>OK -- I sort of like these PKES-series knobs as shown here:
>http://www.newark.com/product-details/text/CD121/5250.html
>
>However they come in a variety of sizes/diameters (.748", .855",
>1.012", 1.296").  Since I have no finished modules as reference, could
>anyone tell me what the best size to order would be for Fracrack-sized
>modules?

This is the standard knob for MOTM:

PKES-90B-1/4

Encore Electronics uses one this size:

PKES-60B-1/4

This is probably the best size for Fracrack.