Ft96 (ex ?) fostex supertweet
Dewhizzered w8 2145 (maybe), maybe 1808/1772 but with flat phase plug.
(Not sure how the driver isn't climbing past 1khz without whizzer, nor how it can go high enough to catch the super tweet).
If it is 6db and time aligned, I'd be for it.
My buddy wants to play with a dome ghosted into an 8" full range, just to add some off axis highs.
I'm partial to a morel (with 700hz fs), works well 6db, maybe 6khz pole, maybe higher.
Sort of leaving the point source, but full range works untill you want a little more full range, or dispersion, or bass, or loudness !!!!