I think my problems have been with the joints within a timber. I thought I understood the component within a component, but I just can't seem to make it work. Question?

What is the basics of clicks :-)

Single click?
Double Click
Triple Click?

By the way, I followed your advice Mike, and started with a simple 2X10 board, saved it as a component, then imported while the rafter was selected. I then formed the Rafter King Post tenon, and put it in it's proper position on the Rafter. I now have the rafter King Post joint working... Woo Hoo!