actually,

the hole u made with the grinder looks good, u have steady hands, but i think u need to grind it to make it smooth and looks much better..

Its not easy to use a grinder to cut a hole.....

lanevochris,

that blowhole reminded me of my first top blowhole mod.

Because my Hole SAW backed out on me, i had to use the drilling method just like the one u used....

filed it and put a rubber lining...

now it looks ok..

but because of the heat and pressure, the steel is not as smooth and flat as it was before, got a bit of lumps...

yeah bombman, i noticed that too on my 2nd mod, so i have decided if i wanted to mod i wud dismantle the part first and do it slowly and as gentle as possible...

hehehe.....

Any solutions to prevent those lumps , vasoline ? helps ??