That happens when the hole is too big typically. Can always trim a small circle of metal to fill holes like that, or put copper behind them to help prevent the holes from growing larger when filing them..
Check all your welds for porosity with a flashlight too.
Cleaver trick sir! Thank you sir. Copper
Common sense, the least common of all the senses. Mom.
For fear of ridicule, society stifles creativity. Ricky Valdes
Thank you sir.
