SCBA on the roof ?

What about adjusting SCBA do make reduction from 300 bar to 8 bar and allow carpenter to work on the roof w/o compressor ?

[@aymanio]

Getting rid of the compressor and the dangling hoses would be a HUGE benefit.
How many nails can you shoot with one tankful? Enough for 1 day's work?
Would HSE have no objection to this configuration?