No Wah. Basically - how far down the Right arm (blue forward yah) should it be (from top TRF to seam)? The current range of guesses are between 5 and 8cm and none of my other jackets appear to be the same (shoddy I know). Want it RSM proof. I thought about stitching it to the collar instead but don't think it'd really be that fashionable. Thanks.