Hi Ross,

Yes that was badly worded. I'd assumed RHS (but it was written as rhs), and since you don't know what other people know the only open section (since channel had been mentioned) I could think of with similar letters was RSJ. Wanted to make sure, and suggest the closed sections as the ideal.

Will do better next time

Psiron,
There is a good following for Joe's 4x4 machine, and videos show it cutting well. My next machine may go that way for some aspects.

Barry