Hi Boris,

That larger radius "F" should be easy ! Again make sure that you have a solid support on the cross slide for your workpiece. If you have the clearance to mount the workpiece horizontal and achieve the radius that's great !

However I suspect that you will have to mount the workpiece vertically. I would use a block of hardwood fastened to the cross slide and shaped to provide support for the workpiece, then using a fly cutter in the chuck set to match the radius that you need with the end correctly shaped to get the surface form you want. I'm assuming that the large radius has a hollow form. If its a flat surface then it is just a matter of setting the fly cutter to get the radius you want.

Hope this helps, its not easy trying to describe it