[nobby2 (Neil)]

I am in the processes of research, reading, note taking etc to build a portable Newt probably 14" to 16". Its going to be a long term project as it will take at least 8 months to save the money for the glass.
Began with the two books "The Dobsonian Telescope" Kriege and Berry and "Portable Newtonian Telescopes" Highe.

Three months later I have a spreadsheet with dimensions, calculations and scale drawings on graph paper.

Interesting to note the difference between the two books. Kriege (old school) Strong, well built and Large.

The more recent approach to design appears to be based on how you establish and implement the balance or M point, as this shapes the rest of the design. Kriege uses the middle top of the mirror box as the point of balance.
Highe uses a spreadsheet to calculate the precise point of balance. In my case, based on best estimates, my distance is 17 1/4 inches. This will be used to define the Radius of the Altitude bearings. Thus enabling a low mirror box and rocker.