Just got a new shorty kit. It has lots of great stuff in it but it doesn't seem to work. I have to suck my brains out to get anything and it's making a lot of air noise. The PS works great though. I really want this to work. It seems that the cart and the batteries are not seating properly. I've tried them both with different carts and it's the same. I put a peice of Scotch tape around the joint and poked one hole in it and it works fine. I shouldn't have to do that though. Can anybody help?