Its a real shame when something you have waited for and looked forward to getting is not right, especially when it also costs a lot of money. All I can say is my MM exhaust was a very easy fit, probably less than an hour and I dont recall getting the pipe to fit round the frame was problem. The most difficult part was the inner exhaust manifold nut on the left hand side.

I have dealt with Metal Mule a couple of time and they have been very good with me so I am sure they will sort out your problems.

Good luck with it all.