Redrilling Brake drums for 4.5" bolt pattern

Why not go buy the proper drums.....what are they 10" diamater by 1.75 or 2 inches wide or so? Can't see them being much more that $80.00/pr. New is good.......
You might have the holes elongated, and it might center on the register - but I think it possible there will be a little slippage ( I know, the wheel should sandwich it all in place) causing a possible "clunk" noise on application or worse there will be "chatter" on high speed application if it does go out of round (think wet roads etc...)
If you're bucks down then it might be a temporary solution to elongate, but I don't see good coming from it in the long run. If the factory didn't take the short cut then maybe rethink the idea........
Daryl