Yes @jaytor, I neglected to mention Danny has developed his own version of the NEO3, has it made to his specs, and is using it in some of his models, including yours. And thanks for reminding me of that company name---Serenity Acoustics.
There are a group of guys who hang out at the Planar Speaker Asylum, some of whom have replaced the midrange driver in their Magneplanar Tympani T-IVa's with a line of 6 or 7 NEO drivers, I believe the NEO8. The Maggie midrange driver was the weakness in the fantastic T-IVa model (I have a pair), and the use of the NEO8's (in a line source arrangement) partnered with the Maggie ribbon tweeter and double 16" X 72" Tympani woofer panels (which I spoke of above) is a killer combo. I waited too long to acquire a set of the NEO8's, and am hoping they are eventually put back into production.

