Re: Hot rails, use a 500k pot?
Pot values is thing of tones. Rule of thump: high impedance of the pickup, high pot values. On the other hand: If you like it as is, everything is fine. I tend to change all neck vol with humbuckers to 1 meg pot, but this is me. Another point of view is whether you like to fiddle with the pots. The so called taper is a very big thing with some guys here.
There are ways to alter the electronics on stratlike guitars that the humbucker sees 500k while the single coils have 250k.