I use 1/4" Bluepoint and also 3/8" drive for all my Allen drives and the beauty of that is adaptors are available for each drive size to 1/4" hexagon...
It's actually very difficult to plumb a bandsaw on two axis, though still best be done to setup a modern saw (upper wheel protrusion adjustment)
and...
Cameron, after a couple of years of use following repair, the stone came apart. The epoxy just peeled off. There was no perspex base at that time. It...