Check the O.D. of the bushing with a micrometer or caliper and use a drill bit that will give a snug slip fit. If the bit is the same size, you can ream it to perfection. The end goal is to eliminate slop in the hinge. That's how I did mine and they are solid. If the bushing spins in the hole, but does not wobble from side to side, you're still good. I don't know the measurements for your particular hinges, but the method I described will get you there.