Redrilling Brake drums for 4.5" bolt pattern

I have Strange axles. Putting the car back together, for some reason, I used the 4 3/4 pattern drilled in the hub, thinking Chevy rims are cheaper. Then looked at my 4 1/2 drums. Poop. Then took them to a local machine shop, with a template I copied, and asked, since the hub is self centering, can we just elongate? $30.