Henry, this is not the place. This is the page to help update the documentation as part of the community. If you are missing parts, I encourage you to open a ticket at the following page:
The short screw is important to clear the touch display, should you have it. The long screw will contact the PCB. DO NOT BE WRONG ABOUT THIS.
Check their instructions before you wreck your construction. As of March 2019, these instructions no match the hardware. They are a rough outline.
The bolt with washer attaching the Peek is one of the LONG bolts. All others used with the T-nuts are the shorter bolts.
I wrapped a post in sandpaper, and gave it a few twists. I also wetted it with a fine sheen of lithium grease (wipe it on, then wipe it back off). That helped bearing insertion immensely.
My nozzle (March ‘19 MAX v4 kit) required a 1/4” wrench. Neither my 6mm box wrench or socket fit. And 7mm was dangerously loose and apt to round off the brass flats.