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Hi All - just wanted to share my (almost complete) 7.2.4 HT build, using for the mains (by Craig Salin - I see that he's active on this forum), and a for the center channel. I'm still working on putting up various room treatments, so not yet ready to show everything off 
Using an Epson 5040UB projector on a 125" painted wall screen (flattened wall, projection paint).
Building the speakers was a very fun and satisfying experience, these were the first I've ever built. I used Baltic birch for the construction, and for the Keramiskas, put constrained layer damping with caulk/ceramic tiles (as per the design), making a very dead cabinet. These have an F3 of below 35 Hz which blew me away for a bookshelf, and they sound excellent. For the Loki, I went with a coaxial design so I can get good off-axis performance, and lends itself to a design that isn't too tall. I have two subwoofers (HSU ULS-15) placed at the wall mid point (front/back wall) for optimizing bass uniformity across two rows of seating, as recommended by a Harman study, so this needed a center channel that wouldn't be too tall, without making the screen too high (not enough space for an AT screen in my room).
Using an Epson 5040UB projector on a 125" painted wall screen (flattened wall, projection paint).Building the speakers was a very fun and satisfying experience, these were the first I've ever built. I used Baltic birch for the construction, and for the Keramiskas, put constrained layer damping with caulk/ceramic tiles (as per the design), making a very dead cabinet. These have an F3 of below 35 Hz which blew me away for a bookshelf, and they sound excellent. For the Loki, I went with a coaxial design so I can get good off-axis performance, and lends itself to a design that isn't too tall. I have two subwoofers (HSU ULS-15) placed at the wall mid point (front/back wall) for optimizing bass uniformity across two rows of seating, as recommended by a Harman study, so this needed a center channel that wouldn't be too tall, without making the screen too high (not enough space for an AT screen in my room).
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