Just bought a 94 M900, but it has 2 broken head studs. One on the vertical and one on the horizontal. Tore it down to find they are broken in the case. Im going to replace all the studs so i wont have this problem anymore, but even the studs that i can get a puller on wont even move. The steel that the studs are made of has ruined two of my stud pullers and have barely left a dent in the stud. Nothing will drill the broken ones to attempt a ez out, even carbide and cobalt will only make a shiny spot. Has anyone had this problem and may have some tricks to fixing it. The only way i see to fix it is to gutt the motor and plung cut it on a mill. Please help.