Drill the guide out to within about 1/8" of the outside diameter, then use an air hammer to drive the remaining sleeve out. Machine a driver down to a few thousandths under the OD of the guide. Turn the air line pressure down to get a moderate amount of "thump" on the guide, not a massive pounding. I've had good luck with that method, especially after applying some gentle heat and soaking the drilled-out guides with a good dose of KROIL overnight before driving them out.
Jerry
