I just bought the Olympus PT-EP10 housing with the Oly EPL5. Playing with my new toy, I was pleased with the nice layout and handling of the push buttons and shutter (compared to my Ikelite housing with D7000). And the clear LCD monitor. And...this set-up is really small and light! Then I tried to mount the Oly housing on my regular Ikelite SLR tray, after drilling two extra holes in the tray. This allows me to connect the Ikelite DS strobes via two fiber optic adapters to the Oly housing. But the problem here is that the handles are too far away from the control buttons (upper picture). The solution could be to keep your hands not on the handles, but on the Oly housing itself, once you are ready to shoot underwater (lower picture). I also have the impression that the PT-EP10 was primarily designed for direct handling, not via the two handles of a tray.
Edited by albert kok, 03 October 2013 - 08:36 AM.