New (to me) trailer company - all aluminum and Light

This could work as a single hand dolly? Well maybe not of the sand is too soft or deep.
Looks nice though
www.trailex.com/products/pc/Single-Light...r-SUT-220-S-7p39.htm

I may use this (slightly bigger, medium duty) for a slightly bigger boat I have in mind that kinda looks like this one.
www.trailex.com/products/pc/Single-Mediu...r-SUT-500-S-7p18.htm
the same style comes for light duty
www.trailex.com/products/pc/Single-Light...r-SUT-250-S-7p25.htm

anyway - food for thought

I have the first one. I'm currently using it as a double kayak trailer, but it was for a Super Sailfish originally. It's from the '60s and still in great shape. It's definitely heavier than a Dynamic/Seitech because of the road axle and wheels, but it's REALLY light for a road trailer. I'm not sure how you'd get the appropriate rear support on it for a F5 though. I don't think you can with the stock parts, but Trailex has lots of other things available and they're like Legos...expensive Legos.