Welcome to the fuselage section of the build, where instructions really start to disappear from the manual.

A lot of the information is now just on the drawings, so be sure to really read every single notation.
I don't recall having to fabricate these small spacers, but they are shown on DWG 19. It isn't unusual to find small pieces like these in some of the paper bags, or maybe Van's missed these in your kit inventory? If you can't locate them, just call Van's and tell them they are missing from your inventory and they will send replacements out.
If you are going to go with Fuel Injection on the engine, you can eliminate the Aux Fuel Pump Doubler. I also ended up getting rid of the brake bracket when I added a parking brake to my brake system. Don't drill any of the firewall penetrations until you have the engine/prop figured out. The exception would be the 2" hole for the cabin heat. Much easier to cut this out now.