Les I was going to get a SMTC on my VF-2 when I bought it. I talked with Haas here in Phoenix and local riggers.
In the end there was no way to do it with a standard garage opening and a full sized machine.
They did tell me they could probably tilt a mini, or a DT-1 enough to clear the changer. That theory remains untested as far as I know.
Before you give up on it though have your Haas dealer talk with the riggers and see if they can do it, good riggers can do some neat stuff if you pay them enough.
In addition I was not able to get the gear box option, also would not fit.