another angle on trolleys

i made one of these trolleys for my sea kayak years ago , and have decided to go with the same design for the espri, its light and has been made to carry in the rear well of the kayak in cases where i have to wheel the kayak a fair way, the wheels are golf buggy wheels and the v section that goes under the keel is 3 mm aluminium covered with foam, i leave the trolly strapped to the kayak when driving to and coming from the water, it cant come off , as the holding straps run under the grab lines at the rear, not a new idea , but pretty simple