Ok , I'm finished with all the wood work on the bass I'm building and it's time for the electrical part . So here are some questions . I was going to use a single Bourne 500K volume and tone polymer premium pots but the come in blue and black , what's with the color difference ? What's the difference between linear and audio taper ? Can you use the polymer premium pots like regular pots ? Are the Bourne polymer premium better than the CTS polymer pots ? That's about it , thanks !