Running a shaper - the compound

[Sunset Machine]

I have that and a couple other PDF's. Maybe time for me to re-read.. They mention "shaping", like a keyhole or trunnion block and manual feeding up/down with your hand on the (moving) compound, but at the moment I'd have to say that won't work, shapers can't do that as long as they use screw driven compounds. You see my dilemma. I'll try loosening the gib screws and letting gravity have its way. I should have tried that already, it's not very intuitive but makes sense after pondering it a bit.