In order to mount a piece of metal parallel to the axis of an axle, you currently have to bolt a lockbar onto an angle gusset. It would be much more convenient if there was a new piece similar to the existing pillow block but with a square hole instead of a round hole for the axle.
Can’t you drill a hole in it?
The hole needs to be a square, which is smaller than the existing circular hole. I don’t see how drilling will help at all. Anyway, this should be an option for teams that don’t have power tools.