I finally decided to get the VorTechs over the Tunzes.
I received two pumps yesterday and installed them on my tank last night. I have a few comments.
1. I think the pumps are made extremely well and the flow is just amazing. Ive never seen anything like this in all my years in the hobby. I cant wait for the controller to come out.
2. As for the instructions and the gasket issues. I dont think the instruction are bad, just a little vague. The instructions could be more clear about adjusting the pin spacer for the tank thickness. It almost sounds like all you have to do is twist the back part of the dry motor. But you really have to pull the whole back (the part that touches the outside of the tank) off of the motor and then rotate it to fit back on. No biggie. The wet gasket issue is a little vague as well. You almost get the feeling that the gasket should be a seperate (third) part from the wet housing and the motor. But it is actually attached quite well to the wet housing.
I think the pumps are incredibly versatile as far as I can tell so far. I bought them to go on my next tank. But I just couldn't wait to use them. I have two now running on my 50 cube. I have them dialed all the way down and the flow just seems perfect so far. I think I can slowly dial them up as well. The corals right next to the pumps seem just fine. The only place where a coral might seem to have a problem would be directly in front of the propeller. But time will tell if my comments are correct.
All in all, if these pumps are made with even half of the detail and quality that IceCap ballasts are made with, I should still be running these pumps in 15 to 20 years and no telling how much longer.