(11-12-2019, 08:30 AM)brianwelch Wrote: Thanks for your efforts Mike...I may put a feeler over at OWWM (mostly shop equipment, but one never knows). I use Dynamic for sharpening, but might give Ridge a shot as they are much closer.
I have a pipe reamer, so might give it a shot on an old throwaway blade to see if it's possible. I am hoping/thinking the flattened sides of the arbor drive are not a deal breaker, and that a true round arbor will work satisfactorily

Anyone know if any shops will/can braze carbide tips on a standard steel blade?

Brian

Brian, do not try to re-bore the hole. Send the blade to Your saw sharpening shop or a machine shop. If the bore is not perfect the blade is scrap. You are correct that the flattened sides are of no consequence. 
You are better off with a carbide blade that is bored 1-3/8" than getting the old blade tipped with carbide. If it can be done the cost may be more than several new blades with the re- bore.
I just checked Forest Blade website, they list a cost of $6.50 to re-bore a blade other than new. Sounds like the way to go. You could buy several blades of your choice from any manufacturer , send it to Forest and have them re-bored.
mike