I got my first EBMM bass, a StingRay5, a couple months ago in a trade. I had been reading about how Jack raves about TI Flats on his StingRays and Bongos for a long while, so I actually bought a set from Steve Barr. I got them maybe a week or two after getting my Ray, but I still have yet to put them on it. The rounds are pretty dead, but somehow, I can't bring myself to do it.
I have two basses: the SR5 and a Fender Jazz, which has TI Flats on it. I guess I can't imagine not having a bass with rounds on it. The oddity is that I don't slap and even with the flats on my Jazz, I usually roll the tone knob almost entirely off (maybe at 20%). For what I play, the flats on the SR5 may be perfect. One part old-school thump...one part punchy, growly StingRay tone. I can't see how it wouldn't work out well.
Jack, Mark, and all you other flat-Ray users...talk some sense into me! HELP ME!
-Nick