personally any alloy clutch basket that the maker put a band-aid steel strap around to hold it together is a week point when adding more HP than the maker envisaged....
most only add the lock-up to stop slip and not for its original purpose "curve ball" and rarely actually understand how to tune it for its original purpose
that aside IMHO and experience the Diaphram blandit or gsxr unit with a lock up is far less tuneable than a coil spring unit for either purpose ...
I have seen many diaphram units with lock-ups where the owners run extra springs and moan about the action being heavy and on off "no 5hit Sherlock"
INHO the coil spring unit is a far better set up all round......
Eg my last road turbo efe made around 180bhp at 6psi .....I ran 3 springs "out of an original 6" with a lock up running 1 bolt and nut on 3 stands and one bolt and 2 nuts on 3 stands ...it was a 2 finger pull and never slipped ................ but they say its a dark art and I have burnt many plates over the years so I guess it must be.............. ps I also don't like the hydraulic operation either I prefer cable