Anybody using their Ikelite housings deeper than their 60m/200ft rating or have experience doing that?

I know some aluminium housings can be used beyong their rated depth without leaks. The buttons can get sticky though, and some manufacturers do offer upgraded springs for deeper diving.

I used an Ikelite housing deeper than rated and had problems. I don't remember for sure, but I think it was the housing for the Nikon D300.

I was on a dive to the Carrie Lee off Grand Cayman and found that I couldn't turn the camera on at depth. My normal use is to leave the camera off until I reach depth and then I turn it on. The was a depth of about 230 feet (can't remember exactly) and the case distorted such that the Ikelite ON/OFF knob could not twist the Nikon power knob. The case did not leak and I never got to try the buttons as I couldn't power the camera.

Some time later I changed to an aluminum housing and have not looked back.

Gary