Any way to straighten bi-metal hole saws to reduce runout?

[Bryce]

another idea is to replace the pilot drill with a solid drill rod and use an aluminum or steel block on the back side with a hole to fit the drill rod. this may help steady the hole saw. I have done this in the past with good results. If you have a mill the best way to make a hole is the offset boring bars that adjust to obtain the correct radius.