Roki, I really like how you did my helmet to JP tube idea a little better by using the origional hook-ups for the tubes. When I did them I modified up some plastic pop bottle lids and caps so I could screw them in, but they were such a pain.
A little advice also on the hoses, make sure they are laying down on your shoulders when you have the helmet on or it's going to get very annoying when they bounce. Mine did that, and loved to make my helmet move when I walked around.
Also, you may want to put some wire mesh in the open slots on the back of the helmet to keep skin or head from showing. If I had known, I would have put some in with your leg armor so you could use it. I'm really glad that leg armor came out good! When I don't have exact measurements I get a little worried. I also think this set looks 100 times better than it would have looked with those origional chest plates you sent.