I would like to start off by saying that your guide has sufficient information for me to put a basic pneumatics system together without becoming overwhelming with advanced facts and ideas. You wrote in a human enough tone that I didn’t fall asleep, but your guide contained a lot of useful information at the same time. I’ll save you from the horrors of grammar and ignore the fragments (consider revising).
Speaking as a beginner with a pneumatics skill level of zero, I would highly recommend compiling the vocabulary that may confuse people like me into a list at the bottom of the guide, as FIRST did in the FRC Aerial Assist Manual 2014. FIRST kindly listed and defined terms ranging from COTS (a “Commercial, Off-The-Shelf” COMPONENT or MECHANISM, in its unaltered, unmodified state) to BALL (the spherical game piece used in AERIAL ASSIST). Considering this, you may also want to explain some of the abbreviations found in your guide, like PSI and NPT, no matter how obvious they may seem to you. Our team may end up using this as a way to teach future team members how to use pneumatics, and to ensure that freshmen who want to understand pneumatics have a satisfactory place to start with, I believe the guide should be integrated with notes on even the most basic concepts involved. That being said, an introduction explaining what pneumatics even is could be helpful. Also, placing the section on solenoids before getting into spikes and solenoid breakouts can help people who have no idea what a solenoid is understand what you’re referring to.
My reply is, of course, assuming that your guide’s intended audience includes true beginners who have little to no knowledge of physics. If you meant for it to be read and used by people who just wanted to put together a functional pneumatics system, then disregard any of my previous suggestions. I would also like to mention that I am writing from random bits of knowledge I have picked up over the few days I had around pneumatics, so feel free to correct anything I may have wrong.
And because I can: polytetrafluoroethylene tape. Fun to say.