The truth is that they MIGHT work, might not. The power boat
stuff is usually much less sturdy, designed to be used on inland waters and small boats. Big power boasts use custom canvas
and the same hardware
as most sailboats. The stresses if mounted to a heavier platform are substatial. On a small runabout when the wind
fills a bimini, the boat heals over, and on a heavier boat, much less so - the hardware
and cloth are taking more strain.
The general consensus is that at least 7/8 stainless tubing is needed for a proper sailboat dodger
The other issue is fit - you have to of course make sure that the thing fits your boat - the mounting points all have to work, sheets
out of the way, etc.
I have looked in the past at these as well, and have not found one that would work of our boat. Yours may be different. The prices are sure attractive! Good luck and tell us if you find something that works!