A few weeks ago, I jumped on the bandwagon and bought a MIM jazz. Today I jumped on another bandwagon and bought a DPDT switch and wired it up to switch between series and parralell(sp?) However i have a problem.....the switch wont fit on the control plate. meaning....i need a push pull pot. my local guitar shop only has a 500k log pots. I know that you are meant to use 250k ones. the one i have know is 250k. The guy at the shop said the XXXk and the log or lin just changes how the tone changes. like the curve of a graph. will it make a huge differance if i get a 500k pot instead of 250?