Sounds like a neat solution.  Most of the flow adjustment systems are either clunky (like running around changing restrictor plates) or mean screwing the actual terminal in and out on the thread, so they all end up looking slightly different if there's a lot of adjustment.   For a budget solution I think it's hard to beat the ones I linked to, as they are very unobtrusive, especially as so few people gaze up at the ceiling all the time, where 90% of them are fitted.  Here's a view of o
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