wow 25.83 PSI, that is tight.
The real world does not work like that, nor can you measure 100th of a PSI. every beverage beer, larger, ale and bitter and the differences between each home brewed batch, temperature, the length of you gas lines, beer lines and even the mood that your in can all make something taste different and perceived carbonation.
There are small home kegerators on the market.
For example, this home kegerator can be installed even in a tight corner of your house https://www.beveragecraft.com/home-kegerator-full-size-includes-1-tap-tower/ And what I like about it you can move it around on casters.