I put 2 of the fuel system style clamps at each position. Clock them 180° apart. If one fails its replacement is already doing its job for you. And you have a ready supply of spares for someone else should wish to take the risky move of undoing one or two...!
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"Talk is cheap. Whiskey costs money."
Very nice set up at a very low cost price considering the high cost of the ones that are available.
After 45 + years off roading with everything from quads to Overlanding Vans, commercial trucks, I have found that the screw on regulated style valve stem obviously take up less space in the cargo box. One hose and four regulators can fit in a cigar box. The issue that still burdens all when airing up is the rate of the compressor. I have had engine mounted converted compressors like Spandex and Yorx A/C compressors to over the counter ARB and other 12 volt units. I have had air tanks and hi priced hi flow air compressors and there is nothing FAST about airing up. I have avoided many times airing down for this particular reason. I have come to the conclusion that I rather have one 20 foot air line and fill each tire to the desired pressure than deal with the lost storage space and unraveling 40 to 50 feet of air hose. The airing up is going to take almost the same amount of time individually as all in unison due to the duty cycle of the compressor and the high temperature that it can get to. Even if it is 100% duty cycle. Moving from tire to tire is not that big of a deal for me and when I am done I can throw the hose under the seat... or in the cigar box!