Is this True about converters??

Transman - Ever have one of those TCI Super Streetfighter converters apart? TCI doesn't have a great rep but I couldn't kill the one I had in a SB even thru a couple smoked trans. Got another on a deal for my BB but haven't convinced myself that I will run it.

I can't say that I've personally seen that model of TCI converter apart, but I have seen some of their product in cut open. Their low end priced units: you get what you pay for, at the other end of the price scale: well made units.
The company I worked for repaired or reworked converters of all different brands for customers. The common thread with the good race stuff: furnace brazed, tig welding top and bottom on the vanes, torrington bearings, anti-ballooning plates , hd. attaching mounts, steel splines in the stator (cheap converters had the stock powdered splines, and they weren't always new splines), hd sprag arangement or a diode style sprag, spragless for some applications. Some street converters(12" and 11" units) from various rebuilders, while not having all the race stuff showed care and attention in the build, others not so. We had one customer who brought us in his stall converter ( a street converter) to check the balance of it, as it shook like a dog passing a razor blade(his words). 25 grams out of balance will do that.