I'm in the planning and gathering stage if building my own 2x72 belt grinder. I have researched belt speeds and got a lot of different feedback. What are your preferred belt speeds when grinding your bevels? I'm going to go with a 17XX rpm motor and step pullys but I'm not sure what size my drive wheel should be. I can get a 4", 6" and a 10" drive wheel. what would you guys use?