Aerodyne tele volume pot question

i replaced the stock single coil in my aerodyne tele with a cheap-ass gfs 10k lil puncher dual-blade humbucker. so far i like it - makes this beast roar. further down the road i'll put a real ($$$) joe barden in there, now that he's back in business:

http://www.joebarden.com/main.php

as well, i may replace the p90 style neck pickup with a mini-humbucker.

two questions:

1. obviously, i will have to replace the 250k volume pot with a 500k.

is this (the 250k pot) a long bushing pot similar to a les paul, meaning without a standard tele control plate, the thickness of the wood might dictate a long length pot?

2. will a standard mini-humbucker fit into the p90 cavity easily, or will there be issues?

thanks!

-david