After watching many YouTube videos on Smittybilt 2781 air compressor modifications, I came to the conclusion that I can do two modifications to reduce the time it takes to air up the tires to the desired psi.
The first mod is quite easy. Just add an air chuck to the end of the Smittybilt hose that attaches to the tire. This makes it much easier and faster to attach the Smittybilt air pressure hose to the tire than having to screw onto the tire the stock hose from the Smittybilt air compressor. I don't know why it didn't come stock with the air chuck, but this was a super easy mod. Just buy the air chuck on Amazon.
The second mod took me a while to figure out. Most videos cut the proprietor Smittybilt quick connectors off the Smittybilt air hoses to add the lockout slide valve pictured in my post. I didn't want to cut any of the stock quick connectors, so I researched those connectors and it turns out they are not proprietary. They are in fact Japanese quick connects. Hardly any air compressors in the USA use the Japanese/Asian standard other than Smittybilt. Everyone else uses the most common "industrial" standard for quick connects.
Anyways, I found Japanese quick connect adaptors to easily install the lockout slide valve. Unfortunately, the valve is backordered two months and it won't get here until mid August 2022. The valve allows me to check the tire's air pressure using the stock Smittybilt gauge without having to disconnect the air chuck from the tire nor having to stop the compressor. Just slide the valve to close/open as needed and I can do that at each tire. No need to do the MORRair kit either.
So, I'll post pictures when the 2 Japanese quick connect adaptors and the usa made lockout slide valve arrive and I can do a quick video on how I attached them and how it allows me to easily check the air pressure.
And if it doesn't work as advertised, then I can use the Japanese quick connect adaptors to switch to the industrial standard quick connect. This will allow me to use all the aftermarket hoses and gauges from ARB, MORRFlate, Flexzilla, and others who use the industrial quick connect standard.