The options you have configuring the lines in the floor will largely depend on how the floor was made up. My floor is 8 inches of 5000 psi mix with fiber and rebar both ways on 2 foot centers. Many would consider this overkill, but I had the material so I used it. I made a 7/16ths wide cut...
If you buy them new, Mohawk warranties the cylinders for as long as you own it. A bit pricey but they're the best lifts available.
I too would far prefer a used Mohawk over most any other new lift.
I have 12 foot walls with 16 feet of center overhead clearance. Lift is a Mohawk system 1 with the lines in the floor so there is nothing overhead and the floor is clear.