Great thread albeit a couple of years old! Spend the last hour browsing as planning a similar sized garage in the summer! Would be helpful to see the larger scale drawings if at all possible. Thanks for taking the time to post all the photos and the detailed description! :0)
I guess this is ramp depending......
Im based in the UK and purchased a 3Ton 4Post ramp which uses lead screws / chain to raise & lower the ramp via an electric motor. The lead screw nut at each post can be adjusted to ensure all the nuts are level, even though the nuts are at different heights...