Pick up truck canopy/topper lifter for £60.

Pick up truck, canopy/topper lifter. The linear actuators were £16 each off Amazon. There were only three, I would have preferred four but it does work fine with three. I would say that the total cost was less than £60! I already had some of the parts and all of the stainless steel box section. There is no science involved in the design, so I would suggest that you do your on calculations before attempting to build anything similar.