johnnyb
Established Member
Just trying to get my head around these. I can see one variation having a single angled shoulder simply to transition from groove to rebate that's simple.
The more complex one has 2 angled shoulders and I think needs to be made to fully understand and visualise ... any hints or experiences?
The more complex one has 2 angled shoulders and I think needs to be made to fully understand and visualise ... any hints or experiences?