I noticed the DigDug2 LED stage controls have 99% of their effect in the first 1/2 turn. Why not sub 2kA pots in place of the 2kB? Is there a technical reason I'm missing?
It's more of a parts issue. I don't know if they make the plastic shaft pots in 2kA. If you want with a bigger enclosure you could probably get some 2kA's in a bigger size pot.
http://www.taydaelectronics.com/2k-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.html
Would this work?
It almost seems like 1kB would be enough, honestly.
I know this is very old, but I tried A2K's on my second Dig Dug and it is not better, less fine control. Just removed all of them and replaced successfully with B2K's and feel invincible! haha. forgot i wanted to try the B1K option, but oh well.