I tried a set of used TIJFs on my SRH500F, and took them off after about an hour. They felt GREAT, but on that instrument they had too much of that fretless electric growl and detracted from the more acoustic sound I was going for. Roto 88s were too much in the darker, opposite direction, and the E and A strings had a weird chorus effect I hated and couldn't get rid of (wasn't string twist, defective string, or a nut or saddle issue). I settled on Labella DTF as the best of most worlds on this bass.