I found a pic or two see if I can load them

[Plumber]

if it shows up this is my version of a ball turner a bad angle see if I can find a better one 2nd pic is a bit better

 

[CharlieW]

That's a nice simple solution for an outside radius turner. A variation of your design could be used to make an inside radius also.

I have swiveled the compound to make a radius, in a pinch.

Charlie

 

[Plumber]

You are so right Charlie all I have to do is rotate 180 and it is a inside radius also