I have found a good chainline(47.5) on my bike, but it requires me to run only 1 spacer on the drive side, and 2 on the non-drive side. My question is this: Has anyone modified their plastic sleeve so that they can run 1 spacer on each side with a 68mm shell? The sleeve is too long to run less than 3 total spacers, and I'd like to use only 1 on the non drive side so that the pedals are evenly spaced and so more threads are connecting the BB cups to the shell.