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...
And now... I cheated. I actually cut out two spirals. I didn't trust the 7mm ply, so I cut a sheet of 12mm MDF at the same time. My poor jig-saw.
Take one Jig Saw / Sabre Saw and one draw on sheet of timber. Ensure the timber is raised more than the length of the blade (the observant will...
Inked in black the "cut out" lines, including between each track centre for the spiral proper, as well as around the inside of the...
Drawing a spiral for the track centres. Next: drawn over the pencil arcs with a permanent marker - Red for track centres
Drawing a spiral for the track centres. Halfway through drawing freehand arcs, I determined that I really need more section lines to draw to,...