The avatar’s spider was in fact stolen from my first modded brake rotors - these Dirty Dog rotors.
I’ve used that design many times all over the very first black Strida.
And actually there’s a Spyderfly Balisong part of the collection; just I’m collecting not by brand - by flavour only 
Also I’m highly interested in automatic knives, daggers and everything made of Damascus steel 
Regarding pressure loss on tubes in Kojak size please don’t overlook that the total air volume is very small (imagine a Spaghetti noodle) compared to average sizes in usually much bigger width.
For my meaning is a reduction of 0,1 bar per day totally normal with Schwalbe tubes.
I had also the feeling that Sclaverand valves hold air better than Schrader.
At that high pressure you’re using (me too of course 
) you should keep an eye on the perfect sit of the rim bands. They must cover the nipple holes in the rims completely.
The higher the pressure - the more the bands tend to slip left or right.
Finally not a big problem because the Schwalbe high pressure rim bands (not self-adhesive tapes, caution) are available in 355er size 
Sloppy work with an electric screwdriver, caused mainly by lack of time - that’s my thoughts for your bolt issue…
I’d try first to hit a hex nut into the bolt’s opening, then try to turn while applying pressure onto the ratchet. Brake bolts are glued - therefore I believe that the very first loosening movement will be the hardest.