you could get a soldering gun seeing as you are pretty into DIY and stuff like that
you need a soldering iron and ptex welding sticks
and metal grip wire since it is next to the edge (you also need it for any other core shot, it will bond to the wood better than regular welding wire)
I have not used this setup but I plan on it soon. This seems like the best option for any home base repairs because the repairs are unlikely to rip out like a ptex candle drip.