Re: common tooth vs. champion tooth
Miles
>I've seen a nice book on 'Saws and Sawmilling' written for the benefit of mostly tropical-country mill operators (i.e. where they were still hand-ripping trunks to boards in 1980!). There was a lot of subtle detail about the cutting action of the crosscut saw tooth patterns in particular, I'm not surprised you are seeing various tooth patterns. Modern patterns may not be as carefully optimised, as there are few or no professional saw buyers for large manual saws, who would be those most likely to know and care.
Seeing 3-foot diameter trunks, 20 feet long, being manhandled onto trestles before being ripped by hand - makes one realise what 'work' can mean for some people! They sure didn't need to go to the gym.
Miles