1. Take the gun you normally carry......... 'cause this is a tactical pistol class and you'll be working from the holster for basically the entire class.
2. Take the px4 also......or some gun for a spare........ 'cause (statistically) your carry Kimber probably won't make it through the class without giving you trouble. Nothing against your Kimber, but 3" 1911's usually don't hold up in a high volume class like a Glock or a Sig would (statistically).
3. Keep in mind that you'll need at least 3 mags for either pistol. Plus a good holster (don't take a Fobus to a TR class
), plus a mag pouch.
4. Call TR and ask.