right i will be using JE pistons in my focus rs engine. i have all the stuff now and the block has been honed to size by halesowen engines! i have measured the internal bore and i have on cyliner 1 - 86.020 cyliner 2 - 86.010 cylinder 3 - 86.020 cylinder 4 - 86.010 all in mm but im a bit lost with gapping.

the instructions say that for high performance street and strip the top ring should be gapped to bore x .0045" the 2nd ring bore x .0050" and the oil ring min .015"

now for that i am working out the ring gap of the top ring should be 3386.614 (mm converted to thou) x .0045" = 15.239" is this correct? or am i doing something wrong? so in theory the gap should be 0.0381mm? getting muddled in numbers here lol