I'm just trying to get a mental survey of the RS180 2-way (TM) designs out there. To my knowledge there are only 3:

Jon Marsh - Modula MT
JayWJ - 2-way sealed bookshelf (Seas tweeter, right?)
Lou C - Cryolite

The only one I've heard in person was the Modula. It was quite nice! If anyone has other designs I don't know about, please add them. And if you own--or have built--any of the mentioned designs, don't be afraid to tell what you like or do not like about them (ie: midrange clarity, bass extension, imaging, etc.)

(By the way, if anyone has a pair of RS180s that they would like to sell me, send me a PM)