There's a guy selling "ready made" pressure gauges for King Kegs on eBay . . . but I figure can make it far more pimpin'.
I can fit 3 kegs, side-by-side, in the shed on a shelf, so will run a pipe from each tap (I'm fitting ball-valves) to a back-plate that will mount a tap for each keg . . . .
. . . Also, each keg will have a pressure take-off that be connected to its own gauge which i'll mount above its corresponding tap.
That way I can keep tabs on each keg without going outside and know when I'm close to zero pressure (and air getting in) in each barrel . . hopefully minimising the risk of it going off.
Plus it'll be a damn cool set up with 120-pint capacity !!!