1) Cool.
2) It seems the FXR has a more focused hot spot, which results in a little added distance. I have the md2s 5.0 and I love them. The fxr requires a lot to fit into the LTZ lights. Md2s only needs a hole drilled in the cap for the wires. Easy.
3)Yes, you will have a quad high beam with the splitter if you choose to use it. I upgraded my 9005 high to a 9011 hir bulb. A little whiter and puts out more lux vs the 9005.
4) I used the 3d printed brackets from @FastWS6TA in his kit, and the alignment is spot on.
5)The cutoff should be 2" down from the center of the projector when you are 25' from a wall on a flat, level surface.
I thought about adding a light bar behind my grille, but with my retrofit, it is not necessary. I have also have some Rigid dot/sae fogs that are pointed slightly out for added width. I couldn't be happier. They have a nice cut off, and are actually street legal.
I always had PnP HID's in reflector housings that were pointed down, to avoid blinding traffic. I absolutely love these lights and how they turned out.