Well, if you want my story: I have a two-bay garage with a side-room machine shop, and a shed aside that for storage. It all had a black-iron system in it with a cobbled assortment of drains and accumulator tanks when I moved in, all of which leaked like a sieve- my 60-gallon compressor would run at least three times a day just keeping the system charged.
I pulled all that out years ago, and for at least a decade, planned to replace it with a soldered copper system. The two main sticking points there being a lack of an easy way to make a wall-mount outlet fitting out of copper, and of course the hassle of having to try and solder joints while atop a ladder, etc.
Last year I finally bit the bullet and bought a Rapidair setup- as noted above, largely due to the positive results I saw here on GJ.
I eventually used most of two 3/4" kits and about half of a 1/2" kit.
The compressor got moved out to the shed and stuck in a convenient corner, with two water separator/filters, a new extended stainless steel 1/4"-turn drain, and a pressure regulator keeping the whole system at 90 psi. (The average requirement for the majority of my air tools.)
I ran 3/4" from there, through to the machine shop and across it's (unfinished) ceiling, along the way branching off three 1/2" drops:
Two are located near the main-use machine tools, and mainly used just for blowguns...
While for the third, I custom milled a sort of bulkhead outlet mount...
To plumb an outlet right next to my main workbench area:
I wanted it angled down more than usual- but not quite flat to the wall- as that's almost directly below my vise, and I didn't want it sticking out where it might get in the way. Turns out it's at least half an inch inboard of the edge of the workbench, so fairly well 'protected'.
Out in the garage area, I splurged and put two dual outlets, one between the two garage doors, and one between the garage door and the man door:
There's also two other outlets, one on the side wall and one on the end wall near the welding bench and the big lathe.
And, one little trick I did to the mounting blocks is I used a belt sander and deburr wheel to smooth the corners a bit, just for appearances, and I countersunk the mounting holes to better accommodate standard drywall screws. My shop walls are plywood, so that's the preferred method for attaching racks, shelves and other storage.
Overall, I'm very happy with the setup. The compressor, being in the side shed, is a LOT quieter in operation, it's a great deal more convenient to have the multiple outlet locations, and after a little leak-chasing, if I don't have any hoses connected, the compressor only cycles roughly once every 20-22 days to keep the system topped up.
Might seem like a lot, but I have over 150 feet of tubing, nine drops with eleven total QDs and something like eight elbows and tees.
Doc.