Well its been over a year since i put a mac together. The last one i did was a real frankensaw super pro 70 gear drive.....this past week i took all the remaining parts i had and built another 70cc rigid saw. G70 cylinder, 7-10 crank and piston, 7-10 oil tank, g70 fuel tank, 10-10 air cover sdc18 carb off whatever it was from. Took a few attempts to get the oil pump working and an overnight soak to swell the fuel tank gasket but its all good today and running like a 70cc mac. Came inside and told the wife....i still got it!! She just shook her head and laughed at me.