Yet another Slipper clutch (couple of pics)

Sorry to bring up an old question, This was under the words of wisdom but thought I might get more responces under Hooliganism.
SO:
Yoyodine(US model) is a sigma, Looks like it is easy to install.
789.00-829.00 ktmtwim and some other sites
http://www.indysuperbike.com/customer/p ... tid=161025


KTM Brand is a Suter
1290.00 1320.00 ktmtwin(?) and other sites
https://www.ktm-parts.com/mm5/merchant. ... =PPST990SD


STM is its own How hard is this one to install . Utilizes OEM basket & clutch plates (thinking about this one, how about MH clutch cover fitment)
1320.00 some sites
1036.00 oncycle.com
http://www.ktmtwins.com/990superduke/013521.html


Any ideas, BTW I don't as of yet do track days but would like to next year. But I have had that rear tyre hop in turns and hope that with the slipper clutch it will help.
Also looking at the HM quikshifter

How hard is the suter to put in

Suter clutch is not hard to put in yourself. You get a gearbox locking tool that you screw in to enable you to remove the big nuts. Must have a good torque wrench though for doing up the same nut at the end. Great bit of kit this clutch, I recommend it a lot.

I bought the KTM billet clutch cover and i think i read that the STM slipper won't fit under it?
will the suter or the sigma?
cheers.

paul.