My first fretless, Yamaha RBX250F from Ebay, $150. I took it totally apart, got rid of 97% of the roundwound string rash on the fingerboard (almost said 'fretboard'). New Alpha 250K large diameter pots, Sprague 225P orange drop capacitor, 0.1uf, new jack, Babicz bridge, changed all hardware to black. Rotosound 88 nylon tape wound strings, .115 - .065. Neck is dead flat, action is low. Bass plays great but I have some sound problems. E, A and D have a nice growl while the G is just the way I wanted it - almost all fundamental, very little overtones. This with the tone knob fully low. I can't overstate the big difference in tone between G and the rest of the strings. So, I have a tone balance problem across the strings. Playing at the bridge, the neck or in between, the difference is constant. P-type pickup is adjusted 'normally'. Closer to A and D. Farther away from E and G. Pots are linear taper. Vol measures 218 ohms, tone 238 ohms. Coming off the low end, the tone varies over the first 35% of rotation, then doesn't change from there on. I basically have two tones to choose from. Almost like a switch. Last, but not least... ZERO Mwah! All playing so far has been with MB-115 amp EQ set flat, no GK 'boost'. In other words, amp is in neutral. I was looking for a poor man's approximation of URB which I got to my satisfaction on the G, but not E,A,D. Plus, no mwah. I'd love to hear some ideas! Thanks.