Personally I have had an arc flywheel and a Midwest flywheel, I would but the Midwest again if I were to build a different motor and they had one available for something besides a Kohler. They look extremely nice, have a steel ring gear(no more ripped off aluminum teeth and $70+to replace it.) if you ever have any thought of run ing electronic ignition, midwests flywheel is ready for that, just add their bolt on ignition kit. And if you really stop and think about the logic, pay $70 for a ring gear, then pay to have the hub machines to fit a Kohler (if it's big enough, I don't have one here to measure for a briggs). You will have around 150-200 in all that if your a guy who walks into a machine shop off the street with no inside connections. At that rate you could sell your flywheel and put a little bit of money with it (what you would spend at the machine shop and on the ring gear itself) then have the cash to buy the MWSC flywheel and it will bolt right on