just got done knife edging the intake of the crank and doing some work on the counterbalance like friction relieving the rh side and relieving the center hole, also angled the front side of the crankpin and then polished all the marks out and rounded all corners.... this is my first time for modding a motor and uploading pics.... so i hope it works !!!!!!! This motor is an os .25 fx airplane motor but i havent changed any actuall timing yet..... still pondering that part.... comments welcome.......... ok i give up how do i upload pics???? lol....... not as easy as i thought.