Just some general thoughts, based on actual experience with the ones I built.
I initially built all mine with freeze plugs. I did a set of three packed full of plugs (obviously evenly spaced) and a set where I spaced them out more. As you said, tightened them up as I got to the exit end.
The ones packed full metered better than the spaced out ones.
I’ve since sent them all to ECCO for a recore. One set has serviceable baffle stacks, and one set was converted to tubeless. All of them have staggered spacing.
Here’s an idea of the spacing on the tubeless. They’re 6.5”, 7.5” and 8.5” long.
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