Hey, my -07 xtx crankshaft nut is loosen again

Basic rattling noice.
It holds up like 5tkm and then it comes loose again and its 3rd time now... Last time I used new wedge pin, medium loctite and 90Nm torgue to tight it up. Now I am planning to use new wedge pin, extra hard loctite, new lock washer and tight it up with ?compressed air wrench? as tight as possible

Or how tight I can tight it with torgue wrench? 120Nm?
How have you done this yourself? Im bored to do this every summer.
Sorry my bad english, Im from Finland