At this point in time I have two basses, not much of a collection but the most I've owned. A yamaha rbx170, and an ibanez sr 305 dx (3 seperate knobs, 1 conjoined bass and treble). The yamaha I have defretted and installed new machine heads and flatwound strings on, surprisingly finished successfully. The ibanez has had nothing done to it besides slight damage over the years, and a variety of unimpressive strings that have been replaced with no improvement. So, if you're still reading and care to help: I would like any basis of opinion on how to get these basses into better order, givin i'll only be able to spend about $100 more on each of them. The fretless yamaha will be used for jazz/reggae and (strangely) rap recording. Nut, bridge, and pup ideas PLEASE!! The ibanez I will be using for recording as well, but for speed metal and less ambient music where individual notes need to stand out. I have really dry skin so roundwounds make it tedious to record and mix cause of excess noise, would groundwounds be the answer? (dont understand half-wounds either) I have been playin for about 8 years and always relied on my amps and pedals for tonal simulation, realizing there's more to tweak now. Any advice appreciated but if you detail i will apply to the upgrades, as long as it takes to learn and use.