Played through arcade mode on Melty a few times to test it out, and promptly ohmed the board out afterward.
Not common ground, but the action buttons and the directionals are common, in case you were so inclined to substitute your own harness in (no real benefit of doing this; the wiring is very clean).
“Start” and the top row of buttons are on completely independent reference grounds. Neither group is common to the ground on the USB connection, so this PCB would unfortunately not be suitable for a traditional dualmod with a (next-gen) common-ground PCB.
Interestingly, the start button is tactile. It clicks upon actuation, and feels like a Cherry MX Clear.
The stock lever feels like an LS-58. I do not intend to replace it, other than to test a JLF.
Stock action buttons look and feel like a heavier Seimitsu PS-14-GN. Actuation force is around 150% as much as a PS-14-G, a definite workout for the fingers. They slide smoothly and the button plungers do not come near colliding with the rims, which is very promising. No friction at all. If you like high actuation force, or want buttons for building relevant muscle, this might be an option (read: the training sword is always heavier).
Top-row navigation buttons are membrane rubber-dome type, as expected.
One issue I had was that the (X/Y)/D-pad (read: analog/POV hat) switch seemed to be incorrect. In the up position (marked X/Y), no directionals were registered by the computer, and in the down position (d-pad), analog axis signals were sent. It still functioned properly, I just had to map the game to take that input (would not be an issue with consoles, or with most other games which might expect analog axis signals anyway). Tomorrow I will rectify this and report any additional findings; it may have been operator error (and I do believe it was).
The second switch from the left alternates between 360 mode and PS3 mode (Xinput and Dinput respectively). Tomorrow I will test on both consoles. I’ll also test the vibrating wrist strap. ;o)
I can also scan the instructions and post here, if they aren’t online already. No engrish, but there are some ever-so-slightly awkward clauses.
As an aside, I think it’s cool that they use @FreedomGundam 's preferred layout. The magnetically retained top panel is pretty slick. No screws, it just pops out with pressure in the right place and you can change your art.
If I make any modifications to this stick, it would be to plug the last two holes (L1, L2) and to install OBSF-30s (although I would certainly keep the buttons, they are interesting to me).
Stay tuned for more.
o7