It should not take you more than 10 minutes to assemble all the parts of the Bag I. When installing the brake pads, make sure you install them on the correct side of the bulkhead. The pads go on the bulkhead’s non flanged side. Don’t tight the pads too much, you should have a 4.5mm gap between each brake pad. When installing the brake cams, the flat side must face the brake pad.
I recommend you to assemble the whole bulkhead and center diff before trying to attach them to the chassis. Don’t forget to install the CVA bones into the center diff outdrives before installing it to the chassis.