ive heard and seen loads of bad things about these beam axels.
some one showmed how much flex there is in one when they apply teh hand brake put me right of them. id rather stick with rear subframe
I'm pretty sure that can be said of the huddersfield and jonspeed ones - trust me, the TDK ones are superbly built, extremely strong and a good replacement for a full rear subframe.
we tested one before we fitted it - flex was minimal with full load of me and a fat mate I'd guess at 40 stones of weight between us