Carved out cardboard supports using the measurements for a 7mm subroadbed and test-fit the spiral ramp to them. Putting a ramp onto supports is...
This edited shot shows how the 7-foot Black Butte/Edgewood module replaced the old lift-out.
A cardboard mockup of my proposed helix / helix area. Looking at clearances against the workbench, the supports, the door, the access hole....