I read that some impact wrenches work better if you change out the 1/4 fitting for 3/8. I assume CFMs flow more readily. Maybe less friction loss and netting a few more psi? What are the disadvantages of buying 1/4 thread to 3/8 quick connect couplers along with 3/8 quick connectors? Will the 3/8 fitting negatively affect other tools ..or say hvlp gun? Also what is your preference on tips? T, I/M etc and why?