Wow, I've always sworn by his
Line Length Calculator and have promoted it often but never knew Mike
@mrsoltys Soltys came by here once upon a time. Cool
Anyway...As was said earlier line length really doesn't matter much if at all wrt dispensing a "nitro pour" through a stout faucet as the restrictor plate pretty much dictates the flow rate - and you actually want a decent fluid velocity for the faucet to shine. Slow it down too much and you won't get that lovely cascade effect that tends to enhance the appreciation of the pour.
Back when I was running 3/16" ID Bevlex 200 vinyl and 10 foot runs for my 2.5 volume beers, I ran only 6 feet to my stout faucet and the pours were ideal. Since my 2019 conversion to EVAbarrier tubing for beer and gas lines I still run 6 feet of the skinnier 4mm ID EVAbarrier on my stout faucet because it takes most of that to get from the keg QD to the shank in my 14cf keezer. And at 35 psi through a Micromatic stout faucet I get a really nice pour...
Cheers!