wherein said outer teeth gears include {HEAD ~ a plurality} of outer teeth, each of said {TAIL ~ outer teeth} being crowned 
wherein said outer teeth gears include { HEAD ~ a plurality } of outer teeth , each of said { TAIL ~ outer teeth } being crowned
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH