i removed my SX 200 gearbox (4,8 gear ratio too tall for my 200 factory stage 4 with PM exhaust) and fitted a spare Innocenti GP 125/200 gearbox to have a 5,2 ratio.
Problem appeared when job nearly done (chain, crownwheel and sprockets changed):
i can't fit my SX clutch pressure plate on GP gear cluster, there is no hole in center of the GP cluster to accept the SX clutch plate axe

So, what to do

Cut the protruding part of SX clutch pressure plate or find an Li 150 gearbox?
I do not intend to find a GP casing cover

Change my dell'orto 28PHBH and carb

Cheers for help.