I carry a HK45c everyday. Light LEM, with talon rubber grips. It is by far the best compact .45 you can get today imho. If carrying appendix I see no problem there as long as you get a good quality holster, and a good quality belt. I believe that there are mag extensions for more capacity but I think only for the 10 round mags, which would only make sense I suppose. For me, I have no problem with recoil or follow up shots. I would highly recommend getting the talon grips. Makes a nice improvement and let's you gain better traction on the grip. The rubber ones are perfect for me. The sand paper ones are awesome but can snag clothing and make it bunch up depending on what you are wearing. With the correct gear, you will not have any issues carrying appendix imho. Depending on how I'm carrying, sometimes I have the 8rd mag in the gun, and carry the 10 rounders for my extra mags. I hope this helps answer some of your questions