Drilled top bolts in Legs. Tubes in engine mount that top bolts go through were 6mm id, not sure if this was intentional but probably a good idea. I was concerned if those short pieces of tube were not welded in the correct position, the holes I had drilled in the legs would not line up. Removed mount refitted legs and back drilled tube to 1/4". Cobalt drill bits, not cheap but cut through Titanium easily with cutting oil. Legs seem really short, checked length, they are correct. Axle's next