we recently had a DeTerminator in our shop, (on loan) and we spun EVERYTHING....just to learn the process, etc. Our results were surprising...We carry many different brands with no ties to any one company. The stuff from Ebonite International (Columbia, Ebonite, Hammer, Track) when spun had PSAs that were off from the factory markings. Now, this was just a small sample (our inventory) The balls from Brunswick, Storm and MoRich were spun and the PSAs wer DEAD ON. I had thought that the stuff from Mexico was sub par. I was wrong. Makes me wonder about balls that I've drilled and used with little success. Of course, this only matters for balls with a marked mass bias.
All in all, I'm looking to get more equipment from companies that spin their equipment on a DeTerminator BEFORE it leaves the factory. I know which ones do....