You should be aware that a lot of the lift gates are
junk! They're actually worse than that, they're downright
dangerous!
We moved a VAX6000 using one of those.
Once you get used to the nasty slope, you can cope.
We used a long high-tension strap and continuously
start-stopped the gate and then re-tightened the strap.
Added a few minutes to the process but made it safe.
Do take good measurements of a lift-gate before
commiting.
John A.