I modified a J-Stick to be switchable.
I filed down the bump in the 4/8 way switch so that the lever would slide freely without lifting up. Then I drilled a small hole in the end of the switch lever and made a loop with stiff wire. I then attached this to a screw-eye that was attached to a dowel rod. I drilled a hole in the left side of my control panel and inserted the rod. Then I put a knob on the dowel.
The end result? Pull the plunger out for 4-way and push it in for 8-way.
This was before the J-Stick plus. If I were doing it over I would have bought the J-Stick Plus instead.