Alright after much thought I went with the challenger just b/c of price. I know all the bad rep that Maxline has received but the machine arrived in great shape, just a couple of paint nicks. They did forget to send me the starting clamp that I ordered and the free string that came with the machine, I already contacted them and hopefully I will get these shipped to me soon, but all in all the machine is pretty much diesel. Before this machine I had a klippermate with floating clamps and here is where the questions starts, with the fixed clamps are the clamps suppose to move up and down to match the height of the string bed or is my machine missing some pieces? I know the clamp base locks but the height of the clamps compare to the string bed are greatly different, I will have to manually pull the clamp out of the fixed based just a little every time to match the string height. Is this normal.