Yup, me and many of the acknowledged experts in the field have all these misconceptions about Cox engines. One Cox web page shows the tolerances of the upper cylinder in Cox engines was BETTER than 1/10,000 of an inch. Cox was the only company that didn't have to sell matching piston/cylinders. The tolerances were so close that any piston would fit any cylinder. Clarence Lee was one of the NOBODY misguided people that pointed out that Cox had tolerances to 25 millionths of an inch. The is 2.5/100,000ths of an inch and it is accepted in the industry that Cox had those tolerances. Now if Daring Dave wants to dispute that that's his business. If he wants to look foolish that's also his business. Me and all the misguided morons with rock mentalities stick by those numbers.

Even Bill the resident "expert" agrees that tolerances that close are feasable.

So, if you guys want to believe people with no credentials other than they post their opinions at some publis forum, be my guest.