I am looking to re-drill my homemade front spring hanger to lower my rig a little. Do you guys with homemade spring hanger use an 18mm drill bit (where did you get it), would I notice the slop from a 3/4 with is 19mm? I found a local store with a 23/32nds bit that measures .710 and an 18 mm is .708. Should I make the 1/2 hr drive and spend $28 on the 23/32 bit. What say yee all?