Lets talk about how we might use this.
$99 Lowes. Comes with a 9oz Cylinder. 20oz cylinder available.
Exchangable tanks at Lowers via Blue Rhino. $6 for the small ~$9 for the large. Same tank as paint markers?
I know you might be able to retro something else cheaper, but this has triple threat potential:
1.) Intended use (air tools)
3.) OBA (for Jeeping)
IDK if the guage reads the pressure or allows adjustment. If not a secondary might be spliced inline on the hose.
At the very least the idea that Lowes will be carring these tanks for exchange is very cool.