Line diameter makes no difference. I could use a 1" diameter line and have no effect on flow rate, as long as there's a 1/16" diameter restrictor bushing somewhere in the circuit. That's what the tiny hole in the canister filter standpipe is there for. A canister filter drops less oil pressure than one connecting rod bearing does.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!