Impressive. I have an iron man and the ramp entrance is prone to blowing out on the right. If steel is your MO you might do nicely with a laser cut ramp entrance like I did with Greek Gods via OSH cuts. You can cut grooves in the floor of the ramp to allow vision of the inserts underneath.

You are braver than I with doing the hidden hairpin turn. I would have been tempted to make the ramp as two pieces and join them behind the board. Again nice work.

This question is tangential. Coincidentally I picked up a new right ramp for Iron Man. I’m planning a simple ram swap. How long a job is it?