It takes some time to get all the parts and special tools you will need like nutsert tool, hole saw, specialty fasteners, panel removal tools, posi-tap connectors etc.. Once you have the brackets fabricated it will take about 3 days to complete the job. One day will involve mounting the brackets and new struts and removing panels for wiring runs. Then another day for, mounting controller, modify harness, drilling holes, pulling wires and making all wiring connections. The third day will involve testing, debug and finish work.
This project took me over a week but I was doing a lot of R&D and testing. I highly recommend using the OEM lower strut mounting points to see of they will work. If this works it saves you hours of drilling out the spot welds and fabricating a cover plate.
This is a project for a person who wants a challenge and has mechanical and wiring skills and a good set of tools.
My liftgate is working flawlessly.