Well the 'stock' (ie, non-slipper) STM clutch I ran had an ally basket and
steel plates, and that lasted OK.
I thought it all looked OK, although you've got to factor in fairly hefty P&P charges. but I don't need a clutch *just* yet, and I hoping someone else would be the guinea-pig!
BYW, the term "slipper" is sooo boring. I think we should all start using the German term "anti-hopping"!