Higher Pressure questions: On the pressure switch, you can adjust the pressure up
Who said you need all that pressure?
Most tools run at 90 psi. Only tire changing machines need 175psi
You will save power and wear and tear for running at a lower pressure
More pressure = less volume/cfm (cubic feet per minute)
Pressure is sold as a gimmick at the big box stores
If the switch looks like mine it should retrofit no problem
Disclamer:: consult your electrician before working on electrical equipment