A couple things, first and foremost---Nice Buck, you should be proud!
Then, on the taxidermy, hard to say without really looking at it in person, but, if the guys says something like "Well, I just figured.........." If it starts with that, it means he messed up something and is trying to hide it. I would have said "Let me see my own cape and see what we can do" If he could not come up with it in short order, then I would start getting upset. If he really just wanted to get it on a larger form and HONESTLY thought you would like it better, fine, give him a chance to fix it until YOU are happy with it. Like someone else said, the cape is the one he had and should be used unless the hunter hacked it up for some reason. At that point the hunter should expect to pay more for the mount since the taxi needed to find a new cape. Either way, would love an update, it's a great buck.
Dandbuck