Great to see you back at it Chris.
For anybody that's following and being inspired to use the front end as used on many UK hillclimb specials, the "real" Morgan in my shed uses 25 mm tube for the cross tubes (Actually 1") The diagonal brace on the same car runs from the bottom of the chassis to the top outer junction, and is 6 mm rod in tension. The vertical pin is 19 mm (3/4) and I got mine from the local hydraulic repair shop, they are the hard chrome bar used in hydraulic rams, available in a huge range of sizes and cheap! Many Morgan owners use steel bushes on the sliders with no issues over tens of thousands of miles, just regularly lubricated. Of course Morgans were an era when greasing joints was a weekly job, and oil changes less than 1000 miles.
I posted spring data on my "Alternative Axle design" if anyone wants. The springs were all UK sourced. The rebound springs, as on the Morgan are softer than the main ones.