If you could score some conventional bolts with a standard hex head of say around 10/11mm and of equivalent hardness, I dont see why you have to stick with socket head bolts at all. For balance reasons, naturally you would use all the same types of one or another. Conventional bolts would be easier to source as well as use with less skin off knuckles. A thin walled socket for this application would help with clearance around the boots when tensioning them up.