Reason you don't want to heat up these green shafts is steam build-up inside the innernodes. If you try, the steam build-up will split wide open the shaft. But like I mentioned early, you can take a 1/32" bit, and drilling towards the nock end, at an angle, in the sulcus/dimple area to relieve steam build-up. You can fill that hole in later with super glue and dust........Art