I got the slide fire kit installed and used my black dog drum magazines for the first time. Very impressed with the setup and especially with the quality of black dog's drums. Well worth the money if you can get them half off still.
Only problem with the slide fire kit was the trigger pins were too short! As others have mentioned, the CMC pins were too short and appear oversized in diameter. Using a punch, the pins drive through to the other side and are flush with the receiver, but there is no way the c-clamps will fit. After shooting a few hundred rounds the pins started to back out, so I guess I will need to buy longer pins or the KNS pins.
I decided to install the recoil enhancer myself, and after taking the upper off, securing the barrel in a thick piece of leather in a vice, applying some Kroil, the flash hider came off with one good torque of a crescent wrench. I chose to not reinstall the crush washer with the recoil enhancer because the recoil enhancer was threaded to screw all the way on. So all in all, a happy customer and it was a good experience to install everything myself. Good shooting!