Yes, I took a bicycle frame, added a tricycle wheel on front large size, spread the back fork added a wheel chair axel with wheels to back fork. worked well for adult or child. do not have a photo, the trike was stolen.
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I have. the most complicated part is the rear axel. the one I built used an intermidate hub removed from a wheel and an extra cog attached to the rear fork. the key is having only one drive wheel so that you can actually corner.