Hi all, I bought a moderately used 2007 SRAM Force group and installed it recently on my road bike. Everything works great, except for the cranks. There's an unusually large amount of side-to-side play in them. They're clearly not pressed all the way up against the bearing surfaces.

I've never installed external bearing cranks before, but not exactly sure what I did wrong. I followed Park Tool's instructions. The BB cups seemed to install just fine in my 68mm BB shell.

I installed the right crank, then the splined left crank, and tightened it down as far as it would go. I tightened the bolt that attached the splined left crank almost to the point that I was afraid of stripping it, but there's still a lot of wobble in it.

I'm trying to figure out what could be wrong. The spindle appears to be straight and undamaged.

1) My BB shell is not wide enough. Spacers needed? Park Tool says these aren't needed for SRAM force. And the old Shimano Octalink BB fit fine...

2) BB bearings are completely hosed and flex all over the place. They don't look brand new, but turn smoothly by hand, so I doubt this.

3) There's something else preventing the spindle from pressing all the way up against the cartridge bearing surfaces. What?

Has anyone else had this problem? Any advice will be greatly appreciated!