i bought a pressure regulator to run my k5la at 140 psi because my pressure switch is at 200. i noticed it has a very small hole to let air in, i am using 1/2 inch lines so im wondering if this will mess with the airflow, ill post a picture
You will just need to confirm what the flow rating on that regulator is as looks can be deceiving. You will want a regulator that can flow about 200 cfm or more.
and then if its over that i should be good? it wont restrict the 1/2 inch lines?
Correct. We have used the 1/2in airline with similar systems for years.