Above are photo of the finished assembled bike. I got a little too immersed in the welding and finishing stage to take photos. I'll be sure to get some next time.
Here is another photo of the tube belt sander mounted on the mill. The belt is tensioned by two springs acting on the left hand roller frame. The left hand roller is crowned as well for better tracking. The black knob is to adjust the tracking which is required when the belt heats up etc.