Hi
I built the support myself inspired by models sold by professionals, but which I found expensive, and I bought the manual winch separately in a DIY store.
If you’re interested, I can share the measurements with you. No welding is needed — everything is assembled using screws and nuts. The winch is manual, but it doesn’t cause any physical problems (especially considering how frequently it’s used, it’s not really an issue...).
Indeed, the seal at the bottom of the hardtop tends to get crushed... but I think mine are original, and if they are newer, I believe the effect is lessened. Moreover, once put back in place and given a bit of time, the seal regains its original shape...
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Would you like me to make it a bit more formal or casual?