broken CV etc. with a TT
Dan,
My experience is rather limited, but - it has been my observation that ALL axle failures with open diff or limited slip were caused by hard landing on a madly spinning wheel. In most cases, it was completely unnecessary.
This is not to say that HD hardware is a waste of time; but if someone keeps breaking stuff in the same place over and over, something needs to change - either driving style, or more significant hardware upgrade is in order. A front D44 is by far stronger than LR axle, with regular-style U-joints and shorter turning radius.
JSQ - a TT should not break when an axle lets go (other LSDs don't, and TT is a better one in design and execution).