[Mart]

Thanks for all the advice, fellas. I did a test on an otherwise scrap head last night and it came out ok. I'm just playing about with this, with the aim of being able to fine tune the over the piston clearance somewhere in the future.

I was just pleased to find I could actually get one on there and physically cover the whole surface. I always assumed that my machine wasn't big enough.

Once I get it working as I would like I'll no doubt show it in a video.

Mart.