Great work. Pretty satisfying huh? Good on you for tackling it yourself. Kudos. As you've found it's really not that hard at all and anyone can do it as long as they have the right tools etc...
You did the right thing in cutting the bump stops and using the top 1/3, especially with the shocks having built in bump stops. If going with a really soft setting (near full open valve) with putting in the full bump stop (uncut piece), which I have experienced a lot in a Y with the same shocks, it will hit those often and IMO takes away from the full capabilities of the shocks to do what it was design to do. ie... limiting the range of travel and hitting the bump stops prematurely.
As for the bolts on the top hat, I'd recommend picking up a set of 3/8" pass through socket set, which can be had for ~$35 for a decent set. This will come in handy for your future installs.
I've found the clicks to vary from 26-28 on the ones that I've installed. After a certain point the valve is fully open so the clicks after that point, which is estimated around ~20+/- become imaginary clicks that don't do anything. This is why it's important to always go from Full Close, then work your way up since you can determine for certain what full close is.
While you have just the rear shocks in, try adjusting the rears to 16 from full close for cracks & giggles and see how you like it with the stock front shocks still in. I think you'll be surprised on how much it changes (improves) the ride with just the rears set to full soft (16). Suspension geometry and how a car handles bumps etc... it's pretty fascinating.
Oh btw did your TEIN shocks come with the wire adjusters that you can clip on top of the bolt to conveniently adjust the shocks? Some kits come with it, while some don't. It's odd, but I think the older kits came with them and they started not including them in the newer ones. Still a mystery.
Great work and looking forward to seeing your progress.
/ Typing this from my phone as I'm adjusting my coilovers.