Just been messing around with my POPS to see if it would fit.
The POPS has the same screwholes in the same position - so while the rail system would offset things a bit I wanted to see whether you could just screw it in tight anyway and not worry. The answer is no, at least as far as I can make out. The screws in the POPS don't actually have anything to grip since they're designed to push
on a rail rather than pull
against the frame, so while you'll be able to physically screw it in (and it might even stay there) you wont be able to tighten it at all and it wont be usable in game.
In theory you could modify it to work by using screws with heads that you screw in from the inside of the frame and then down into the asa after deliberately stripping the threads in the frame, but that would involve a whole lot of messing around firstly finding the right screws and then getting them to work from the inside without interfering with the board and battery which may require dremelling, and then you'd be stuck permanently with macro and never able to go back without buying a new frame. Yuk. Almost certainly not worth the trouble since it's a functional downgrade anyway and only matters aesthetically.
The only way for it to really work would be for PE to release a POPS with the same screw system as the stock one OR a non air thru frame with rail mounts.
Also, sorry to do this to your thread Ben but I couldn't help myself: