now I am going to have to figure out the checkering size and redo it which will hide the old repair even more. This is coming out well.

found some remarkable graphite rods. I am considering using them to reinforce a stock I am working on. Much tougher than wood dowel. Will let you know.

I think most repair guys use threaded metal or screws rather than wood dowels, if possible.

this is in line with the wrist and runs from the action down to the butt direction.

Yeah. A piece of 3/8" threaded rod will work for that. Can't get much stronger than that. But the graphite type you mention or fiberglass would be a lighter weight option. Don't know if you figured out your earlier checkering question, but a GH grade would be around 20 lines per inch.

20 tpi, got it thanks, you need to see this graphite, strong lite and tough. don't see a down side yet. will advise. when done , I will figure out how to post pix.