I just realised I could use the metal base with Real Riders from the Mike & Ike Camino and fit it to a mainline I found recently. So I did. Here’s the results.
Before. Tools of the trade in back.
A complete break down. I used the black interior from the M&I UTE!! in the mainline cast when reassembling it.
Done, I like the mainline much better now. I made my own STH!!
Thanks for looking