Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Hi Thomas,..you can fix the grub screw problem by tapering down grinding a sae 3/32" size allen/hex wrench until it just fits.Those grub screws are semi-stripped rounded out plus the 2mm wrench is a bit undersize, but the "customized" 3/32"" will work real good. Good luck wirh you well done engine mods project.