I didn’t have any tubing that was the right size for a gooseneck. The closest is the 3/4″ conduit used for the seat supports. It fits, but it isn’t tight in the grip, so I welded some bead ribs to fatten it up. Now it feels snug!
I cut slits into the gooseneck pipe so the handlebar mount can fit inside. Then I welded it all up.
I’m no welding genius, but I love when two pieces look like one after I’m done. This could use some grinding, but it’s good enough for now!
here is a rider’s eye view of the (crooked) gooseneck and handlebar.