Well RTee, heres how it "shook" out. I went with the MK25 and a700. Worked fine for the 1st dive. My instructor thought it would be ok to test it out. The hole was in 6' of water and we went out to about 30' to test the whole ice thing. Pretty awesome ! Next dive was training. I started out to do my sweeps and got about 30' again and started to free flow. I gave um the signal I was coming in on my own, breathing on the free flow was a great experience. I had under dressesd my tootsies and needed to heat them up and add a layer. Decided to swap my rig for 1 of my instructors. Apex wins! Did the last 2 dives with that and had no problems. I had my Fusion with 2 layers of thermal, whtes 5 mil gloves and besides the cold feet on the 1st dive was quite warm. My hood was a bit large, so it took some getting used to the massive brain freeze. We are planning to get back in for a longer fun dive now we have it dialed in. My sr1 worked well as a pony, we had to switch out under the ice and had no problems with that one. Good luck on your ice class. We trianed 2 dives in the pool with black out masks. Confidence builder ! Came in handy cause it silted out quick in the shallow water. Mike Morehouse and his crew made it a great experience.