I stay at Rotto for 2 one week holidays per year and need to get the SUP (and kite gear) around the Island.
My v2 trolley (steel) was showing its age so needed a new one and also wanted Aluminium frame as lighter and minimal rust issues (spokes are steel).
Some frame mods required
Added some padding under the floor where the rail sits
Some sewing by the wife for the rear end, pad the edge and done
you could extend the draw bar (sleeve it) if you have a longer SUP. In the photos I've got the SUP sitting further forward than I would normally, when cycling I have the SUP midpoint over the wheel axel and that gives me plenty of room up at the bike. 
Spiral reinforced hose makes great snap in paddle holder points 
and still folds flat for storage and transport
Roll on Rotto.............
An improvement.... the board at least adds a little protection as the waterproofing fabric only stops a bit of rain from hitting the little one 
