I had a similar issue recently. bought a vmc15 to put in the basement. My garage door is 86" opening and I got it in with about 1" to spare by screwing the leveling feet all the way up (the pads on the bottom were welded on.) Also the Z axis motor was removed and the plastic cable carrier for the motor was unbolted and layed down to the side. Another issue I discovered that was wrong .... The specifications call out 96" top height of the machine. That was pretty close with the Z all the way down, but was about +12" with the Z all the way up! I had to box in my floor joist and cut a hole in the dining room floor to make it fit.
Now I have plastic cable way that comes up through the floor. Life is hard
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PM me if you need pics. T