Towbar for Model 5

Anyone got plans for a towbar for the Model 5 taildragger or know of any other device that would move it easily from farm barn/shed to field about 50 yards away over fairly rough ground with wings folded?

I already have a road trailer but would like to keep the spats on when moving this short distance.

Thanks, Graeme (Scotland)

I don't have any drawings but I do have a tow bar. When i get back from Osh I will take some pics and sketch out a rough drawing.

Sorry for the delay. Got busy and forgot..
Looks like the fwd square tube is 1-1/2"x3" and the aft square tube is 1"x3".
If you have any specific measurement you wiuld like to know just ask!