I have a Sioux valve grinder set up that I would like to use to do my own head work with. I have had it for many years and have only done one stock (single angle) type valve job with it many years ago. I hear many comments toward this equipment as old school and inferior in the accuracy and quality. People seem to comment that the Serti (sp)or other floating table machines $$$$$$$ are the only way to go? For the home hot-boater who enjoys the build up of his own motors and is willing to reface the stones often, is there anything really wrong with this old school method? Anyone have any tips that they're willing to share?