Using a heat gun makes the glue stick to MH. I removed mine with very little glue to remove by just starting at a corner and pulling a little at a time. I did it in the shade because the sun make the glue stick. The glue I had to remove was easy by using wd-40 on a rag. it wiped right off. try it without the heat and see if it comes off cleaner and easier.
If they drop the Navistar engines, they could again be a contender. But any company that is on its third owner in four years has a lot to prove.There are no more Navistar engines. their design is what broke them. Warranty cost on their OTR truck engines is humongous.