I want to build a trailer for my bicycles. I want to be able to put my double bass, yes this means a stand up double bass, on a custom made trailer and pull it behind my bicycle for some of our gigs. We may play at certain places along a bicycle path on a railroad bed, and I don't want to carry the thing for 15 miles, but wouldn't mind riding there.
I can weld so that is not a problem. My questions are:
Is it better to make something mount to my seat post or to the rear axle area?
How long should the tongue be for better hauling?