When visiting the show in PA I fell in love with the trikes, and no one has one in the UK, so here's the steering.
the first photo shows the parts used, a length of solid rod and tube, an old engine plate, mower deck bearing, a blade spacer, a box of chain and cogs from a auto jumble and steering column for the axle. the second and third photo show the bearing and grease nipple and top gearwheel from a Cortina camshaft, all welded up and will bolt in the chassis rails
next job was to bolt everything together and see if it all fits and works