Designs for the production Laddervator are now (mostly) complete. Platform will distribute weight down onto the ladder (a change over the prototype). Frame will be 1 3/4" welded rectangular tube. Design now has guide wheels (same as the prototype) and adds 4 main wheels that run against the ladder.
This drawing shows how the main wheels and the guide wheels will work together:
The guide wheels will be bolted to the frame using a runner washer to allow for mechanicam dampening.
The Google Sketch-Up 3-D rendering shows what the final wheel assembly will look like.
Glad I took that welding class!