I have about 15 regular 510s, 10 Joye LR510s, and 10 LR 510s from BWB. I couldn't tell the regulars from the Joyes since they were all black and my eyes couldn't see the tiny LR stamped on them. So, I took a pocket knife and scraped all the black paint off the LRs and made them silver. I did the same to the ones from Don, but the bridge it's a lot lower, so it's easy to tell them apart. Add to that the fact that my scraping is not that good so there are random black streaks....and I also marked my
batteries. the original pair from my ego starter kit has a single line scratched in it, the 2nd set has 2 scratches and the 3rd set has 3. Yeah, my egos look terrible. Almost makes you want to take my pocket knife away before I get my Grand, huh?