There is a discussion tab on Fasttech where people can tell you more on each product...and yes...some people have complain about paint on their threads wearing off and some of them had to sand it off with scrubbing pad not sand paper.
BTW
Even the authentic BlackHawk had voltage drops, there were several p-off customers on other forums complaining about it
...just because some guy says "hits like Thomas the Train" etc...doesn't hold true any more and it's very over used word in Mech Mod world now...
in Calivapers forum...there is on going thread about the lowest voltage drop mech...and surprisingly...the HCigar Brass was highly outed...