I have a 2007 Santa Cruz Chameleon with a 68 mm bottom bracket (I think) and I am installing a Tru Vativ Stylo 3 ring crank. My reading of the install sheet indicates one spacer per side for the external bottom bracket. Just wanted to make sure I'm reading it right. I have 3 spacers that came with the crank. Presumably the spacers are 2.5 mm and one per side makes the bottom bracket width 73 mm. I have it set up this way and I'm having some trouble getting the front der. dialed in. Seems like I might need two spacers on the drive side.