Later years now, I'm deferring to a butcher but every now and then do a
small deer.
Friends and I always used a regular hand saw but when I saw butcher zip
off a rack with his hand bone saw, I wanted one. Got the one I
mentioned but found just as difficult to quarter a deer.
Like you say, you don't want bone and fat in venison and other than
quartering, every other cut is boneless.
For op, I did chemical regulatory work and am familiar with FDA
regulations for food contact. Most producers of non-food contact items
are clueless on the requirements as product in normal use does not
contact food. If clean and not flaking off paint and the like it is
normally safe for individuals to use items not designed for food
contact. Food toxicity issues are almost always with the food itself,
not with what it contacted.