In my garage whichever way I load a Z, it's roof down and windows down. You won't forget.I think your lift will lift 1.3M The Z3 is 1.3m high so lifted to the full height of your lift without the additional block the top of the Z will be at 2.6m That's 0.5 beyond the height of my garage below the mezzanine
But the mezzanine doesn't extend the whole length of the garage. I could reverse the car in, lower the softtop and lift the car all the way and the screen would be clear of the mezzanine floor. That would work. But one day I'll forget to lower the softtop and won't be watching what I'm doing.
Tony.