thanks red squirrel ill remember that one!
it was made for a mobility scooter , the alloy sides drop down and two telescopic ramps can be slid out from underneath and placed on to the bed to drive the scooter on, took it in px from a customer.
i will have to stand the jockey wheels out a little as they will foul the body of the trailer, may even use a 12v actuator wich i've got to push down some feet/ castors removing the need for them alltogether, dont know yet
(got all winter). found some old school inspiration at
www.singlewheel.com there are some great single wheel trailers on that site