The stress in lumber particularly Kiln Dried wood can surprise you quickly. I have ripped many a stud and ended up with the blade of a hockey stick. On my list is your book regarding wood technology. Who sells your book in Canada? Thanks
Makes a lot of sense. I have never seen a fence like this. Sounds if it is an after market item.
I find if you look for twists, cupping and bowing of the wood to rip or cross cut will dictate whether it is safe to cut or not.
Based on my experience with a low speed wet wheel sharpening machine which sounded the same as what your describing, I opened it up and the gears were a plastic nylon composition. The gears were the problem, I returned it and they offered a replacement which I declined. Full refund. I also said...
The Dewalt DWS780 12' compound sliding mitre saw is what I use on job sites, and also have the same in the shop. Model number might not line up with same in UK. Very good rugged and dependable saw. The shop saw is about 20 yrs and site saw is about 13 yrs.