Have two 40# Suspa air springs on the front (inside) with two 100W solar panels on front of roof (total weight = ~100 lbs at lift point). Very little lift help from air springs when starting as most of the force is horizontal. To lower a gentle pull on the lift bar gets it started (roof won't start coming down in front on its own). Still use the speaker lift to raise and lower front and back.
Jim - surprised that your drill will not work the lift. I have a cheap Harbour Freight 18V drill that lifts my roof easily.
jim
(Can't get pictures to post from my MacBook)
Jim - surprised that your drill will not work the lift. I have a cheap Harbour Freight 18V drill that lifts my roof easily.
jim
(Can't get pictures to post from my MacBook)