Any reason not to use the ARB tyre inflator (or something similar) to inflate tyres to correct PSI?
I've got the proper inflator (with the gauge) and reckon it's great. Yes, it's exxy, but I'm lazy. I used the standard tyre chuck for ~6 months, and was constantly having to adjust the pressures up and down to get them all right. With the inflator, it's just a case of "hold it on, count to 30, let go, look at gauge, 2 secs of extra blast/air out", and you're away.
+1 to the orange hose as well - it's fantastic stuff. Rolls up nice and tight, doesn't get too hot, unrolls easily without sticking to itself *too much*.
Highly recommended, if you can stomach the cost. On the upside, it's really well built, so will last a lifetime.
From memory, there was discussion on here a while ago about an off-brand inflator that looked identical to the ARB one, same fittings, and was ~$20. Maybe from Aldi? Maybe from an online seller? Can't remmeber - do a search and see if you can find it. No idea on quality, etc, but it certainly was cheap.
Good luck!
Matto