May be a silly question, but I've got Givi crash bars for my 2020 T120. Would like info on - size of main engine Torx bolt where the bars connect to the frame (bigger than T50, maybe T60?) - torque setting for the bolts (I think it's about 118nm) - opinion on whether it would be better to have dealer install (they quote 1/2 hour labour, seems like a lot of cash for for a pretty simple bolt on job) Thanks for input