From one of your photos it looks like it is 1365RPM

I will have to clean my glasses!
Max.

 

Great gents, I can now get myself a sprocket and chain to target my preferred lowest RPM speed before the VFD takes over.
I am shooting for about 10 rpm from the reduction box.

 

I am shooting for about 10 rpm from the reduction box.

That sounds kind of high. Don't really know what your doing with the roller, standard beads or making raised designs like some guys are doing. Most of the builds I've seen shoot for 4 or 5 RPM on the lowest speed with 10 to 15RPM being full speed.

But chain and sprockets are pretty cheap so it can be changed later.

 

I will have to clean my glasses!
Max.

You could be correct, but looked like a 6 to me not a 8. We were both typing at the same time.