Protected 16340 and 17670 cells fit, but 18650 cells don't. Just like a Surefire. If you want an 18650 host for P60 modules, go with a DereeLight CL1H, TrustFire T1 or Romisen RC-M4.
Mine does!!! but thats after hours or sanding and filing away at the aluminium and not to mention sore hands...but if you have the right tools it should be easy!