He was probably peddling some gear like everyone else. I seem to remember he was busted for roids by cops and they stole some watches?
I feel that even if someone gets help to, e.g., engage their lats better it's unlikely the back is going to improve appreciably because of that. At least I've never seen anyone change with better execution. Not saying it's not worth it to at least try and everyone who is really into it will try to hone the technique over time. Some body parts are perhaps better 'felt' due to better innervation or whatever but that would also be because of genetics. And if someone has genetically good calves they never have to think about "engaging them properly," they are just there 
Dorian actually poked fun at Glass for how he trained some guys, like Paul Dillet.
He noted that Charles, "supervising" Paul, would basically stand there and repeat, "Come on, Paul! 'Contrack! Contrack'!" during pulldowns, paying NO attention to how Paul just pulled with his arms.
Maybe better form would have done little for Paul's back, but if you look at the "wizard's" record, who did he help that much once they turned pro? Flex peaked in 1993. Arguably so did Paul. Both got bigger, but compare their looks in '93 to '99ish. Way less detail, plus the oil in Flex. Cormier got a lot bigger but I don't recall him doing any stand on your head sideways pulldowns in a Hammer machine. No: he just kept chasing progressive overload and upped the dose, like Ronnie and Dorian did.
Maybe someone might credit Glass with Gunter's jump in 2002, but that's way more a function of Gunter working with a drug guy like Chad.
There are no magic movements. Some are a bit better than others, but realistically, a Bayesian curl won't do measurably more what a barbell curl will do. While I like Lee Priest, I kinda hate to invoke his maxim to "just find out what works for you, eat a lot and train hard" (especially since that shaves off the bit about drugs). That's ironic because it IS oversimplified and lazy advice. (Train "hard"? What does that entail? Tom Platz "ugh, ugh, kill me!" shite? Eat a lot? Useless vagueisms.) But Lee is closer to the truth than most of these YouTube twits. A couple pair "science" with empirically proven methods aren't so bad, but to stumble off my high horse here, all else I will say is:
*Bwanks is still a royal asshole.
*Where are The Scott and Fortress?
*Eh, I'm old. Forgot the rest
