I don't have a fancy lightbox or backdrop, so I just used the top of my Liger Zero box.
Here's the Arcadia pivot holding up my VF-1 Roy Strike. Its much more solid than the original arm. I definitely like how snug the adapter slots into the stand clip, the other one has way too much slop. Next time I order, I'll have to pick up one of your Fighter adapters so I can put the gunpod back on (forgot to grab one). You may notice the pivot bolt is a little short. I only got one of the long ones (its in the Alpha), so I have to drop by the hardware store to pick some up for my other Arcadia pivots and to have some spares.
Here's my first Alpha test with the MG Hi-Nu Gundam (not the ver.Ka). I really hated the stand it came with. The base was too light and the arm was fairly sturdy but had very little adjustability. Not to mention the plastic rods it came with for the funnels sucked. I used the Metal Build rectangular peg and sanded the sides down a little to fit into the crotch slot. Its not quite the right dimensions, but it works in a pinch. I'd rather use the peg in the back like the stock stand uses, but I couldn't modify one of your adapters to fit. Since this was a drilled pegged base, the holes weren't quite 5mm, so I filed one down to fit a Tamashii arm just to test out a funnel. And the positions of the peg holes will make it tough to have all six out, so I may drill out some extra holes myself.
I'd like to try the Alpha out on a few of my SoCs and MP Transformers, but I still need to figure out a way to mount them. Maybe also try to get a leaping pose with my Liger Zero if I can rig something up. I definitely plan to get a few more for the rest of my Valks and I wouldn't mind replacing the Action Bases on some of my heavier MGs if there's an adapter that'll fit.