Like you guys, I don't trust the gutter clamp system. Nor do I like the speed of an electric hoist. So I built my own system. Attached are some pictures, but I will describe very briefly since the pictures don't show everything. With this design, the weight of the hard top does not sit on the rubber above the windows. And, there is very little metal that can bang against the car or hard top while getting everything in place.
Manual hand winch mounted on wall.
Three ropes from end of winch cable above hard top down to the hardtop; 1 on the front and 1 on each side.
One metal "C" clip that slides under the front/center of hard top; rope runs from the "C" clip up to winch cable.
Each side has a rope loop which connects to the side hard top latch; lift one side of hard top and slip rope in place; rope runs up to winch cable on each side.