I may be wrong, but I think only the 85's come in a BB version, the 81's only come in plain or MG version.
I love my hitec servos. I've never managed to strip one amazingly, although I have quite literally toasted one when I plugged it in, looks like one of the wires had become pinched and frayed (probably because I had them mashed against the frame). Needless to say, I plugged the servo in, and the wires touched and shorted, causing some smoke to rise from the servo. Being the crafty fellow I am, I opened up the servo, re-soldered the tiny wires directly back to the servo PCB (was a pretty delicate process, trying to make sure I didn't cross solder anything, and the fact I was using a big nasty soldering tip didn't help either). But the servo held out, and currently works flawlessly to this day . I was pretty impressed as I was almost certain that little puff was a $20 bill burning infront of my eyes .

So yeah, the moral of the story is, uh, go Hitec!