I bet you converted grains to ounces or grams!!!! GROOVY MAN!!!! Those days are long over!!! It is interesting to note that the Patent Pending Number for the CO-AX is cast in the main base body of the press and visible from the operator's perspective!!!
And, I too have spent days looking for those f...ing jaw springs!!! Finally broke the bank, a whole $2.00 for 2 springs for conserving time looking for a rogue spring or two!!! Still have the 2 original springs!!! Must have scared them!! I will be purchasing the interchangeable jaw kits in the future!!! Right now, all may guns require the large rifle jaws!!!
I bought my Bonanza CO-AX B-1 model press (shell holder priming system) for $165.00 in 1982!!! I use the Sinclair hand primer instead for speed and a better feel for primer seating!! Bonanza also had the B-2 model with the adjustable 3 jaw priming system just like the Bonanza "Blue Ribbon" Primer Seater with "E-Z-Just" Shellholder!!!!
Still have the 1982-83 catalog, price sheets, decal, and box!!! In that catalog, there are 4 pages explaining the mechanical advantage of reloading presses!!! Those 4 pages look like pages out of my old college statics and engineering physics books!!! The article is for C type and CO-AX presses!!! With the basic info from this article and utilizing concepts of geometry, trig, torque, and vector mechanics, it could be applicable for any reloading press, including arbors!!!!