I don't see why it wouldn't work on other 4 perf 35mm cameras. You just need to mask off a 2 perf frame. Lots of cameras have slots at the gate for masks, you could easily make a 2 perf one. You mark a few frames at the start, then when you go for the second pass make sure you line the film up with the unmarked area. Trickiest part is probably separating the 2 different streams in the scan, though I'm sure it wouldn't be that hard.
With the 2C version pictured where he presumably masked the top or bottom half of the frame you might get some issues with the image not being centred with the lens, ie zoom tracking or offset distortion, but it wouldn't be as noticeable as left to right offsetting.
one could either ran it through the scanner two times with 4perf pulldown but masking first the upper part of the image and then the lower part. But it would be more economic, if getting enough vertical resolution from the scanner, to scan the whole 4perf open gate area (the two streams at the same time) and then separate them in edit (very easy to do).
of course the whole roll will be ruined if one screws up aligning the film perfectly at the start of the roll when shooting the second pass. similarly, if one has problems in the middle of the roll and needs to open the movement, the alignment will be ruined and one may need to leave the rest of the roll unexposed which ruins the cost-effectiveness.
as others said, should work OK with every camera which can use separate gate masks. rewinding the film will make changing the rolls a bit complicated and will add some dust to them which may be a problem in 2perf.
other way to do it would be to leave the end of the roll, maybe about 20 or 30ft or so, unexposed. to stop the camera before the roll ends and before the stock is running too low on the feed side, then mark the PASS1 framelines to couple of adjacent frames, then running the camera couple of feets so that you can get enough tail for threading the camera again. then cutting the film and throwing the rest 15-25feets of the raw stock away, flipping the takeup side roll to the feed side, threading the camera, aligning the film so that the PASS1 framelines DO NOT show in the gate (so that you are exposing for the 2ND PASS areas) and then shooting the second pass.
Edited by aapo lettinen, 22 September 2017 - 04:18 AM.