I currently have soft tube and it was all really simple to install, and works well. But one of the tubes, kinks up no matter how i try to fix it. I was going to go hard tube eventually because it looked better. Anyways i have watched videos and read articles about the fittings and still do not understand it all. Wondering if someone could help me put together a shopping cart. I will be doing mostly fittings and not so much bends.