Topic: traditional heat straightening tools?
https://www.youtube.com/watch?v=VK5INvoNTdk
I would like some close-ups on the sides of the tool used here. But I guess, besides the groove perpendicular to the tool, there's also a groove on an angle deeper down to it to allow the arrow to fit better and also to keep indentation marks or whatever from happening? The Japanese arrow straightening tool seems to only have an angled groove.
Also, how hot is the heat box? Looks like they heat the whole shaft or half of the shaft at once.
thanks