Great info guys, I am interested in the cad drawings ed if that is possible, also interersted if geeting the rings cut on a water jet would be lots easier then using a miller or laithe depending on your maching prefferneces bit would probaly need quite a few sets for the price to come down enought, I will get my new gearbox plates water cut so putting them on the order could be an option.
Thanks for photos and info is great removes the guess work