I just purchased the mig 135, cart and helmet package. My question is I just put the cart together, , the top tray has a raised lip on the right side and a lowered lip on the left side. The mig access door is on the right where the lip should be lower. The top tray is backwards , do I have the wrong one or do I need to modify the cart ?? it wont be just flipping the top tray over though, looking at the front legs one is taller than the other. I cant be the only one with this problem.