Along with my Epi Jack Casady and 21 yr old Ibanez Musician, I have a year old MIM Fretless Jazz Bass. The Casady's volume and tone pots are beautiful and responsive. Ditto for the Ibanez, and it's older than a lot of members here! Soon, I plan to replace the pups in the MIM Jazz; I can't stand the hum! I've pretty much decided on Dimarzio Ultra Jazz for the replacements, but, in this month's Bass Player magazine they had an article about tweaking the neglected gear of three random players. This one guy has Yamaha BB 5 string and wanted more out of it, and was thinking of dropping an active preamp in it. They advised him not to because it would need too much routing. Now I quote from the mag, " Instead, we switched out the 500k pots with 250s, giving him the ability to fine-tune his pickup blend a bit more." O.K. I know 500k pots have more resistance than 250k pots, but, what exactly will swithching to a lower resistance pot do? If used for the tone control on a Jazz Bass, will it make the transition from 0 to 10 smoother? This is another thing I can't stand about the MIM Jazz; the tone and volume pots don't work nearly as smoothly as my other two basses. What are the current (no pun intended) resistances of the volume/tone pots, and which ones would give me a smooth transition like my other basses? I posted this here because it's not really a pickup question, and it does pertain to different guitar manufacturers use of parts. Thanks for any feedback, Mike J.