Re-installed new panel onto old conduit/ feeders. Problem is now that we can barely get locknuts on (Iffy connection). This is an old 2 wire system using the conduit as the ground for whole bldg. Definately cannot get a bonding bushing on. Most conduits are only 2-4mm apart. Anyone know of any alternative method such as a thin clamping device such as a ground clamp only thinner above panel then running bonding jumper into panel or something of this sort.