I need to repair my Mother's kitchen table chairs (re-glue). I removed the back on one of them and two of the the tenons that go into the chair back are broken off (this is why it was loose). I know that I can drill out the part that is stuck in the chair back, but how do I repair the the broken pieces from the tenons without having to have someone turn me some replacement parts? Additionally, is there a glue removal out there that I can use instead of having to sand each piece to remove the old glue before repairing?