-------------- Original message --------------
From: Dave Everett <deverett@...>

Hello guys,

I started working on a treadwell yesterday. First step was to locate
suitable track material. Going off the drawings in the photos section
I found some rubber matting with roughly the right cleat size and
spacing. I glued some together last night and it's great, but...
Looking at the photos from the 1977 ETI article, the dimensions in
the drawing can't be right.

The tread in the article clearly shows the cleat size is very thin
and the spacing much larger rather than them being even as shown in
the drawing. The tracking pieces are also screwed in place by the
look of things and are bevelled and shallower than the drawing.

What is the precedence of the drawings?

I plan to go to a library next week that has ETI on file so I can get
a closer look at the photos.

On another note, I started working out the amount of material
required to make the wheels. The closest diameter I can get is 120mm
wh ich I can lathe down, but allowing for 10mm of chuck material, I
find I need almost 1 metre at this diameter, that is about $600 worth!

Is anyone using something other than aluminium?

Dave