Glad that you are pleased with the results of your work. Nothing like having a project go well (to counter all the times they don't:hissyfit.how great the theater sounds!
I plan to finish my ceiling treatment this weekend - the rest of the burlap came in so all I need now is some time.
By far, the most audible improvement came from putting the Monster traps in. The benefits from the ceiling traps are certainly showing up on the waterfalls but they are not as audible as what I noticed when the first 5 traps were put in the room. I suppose that means that the most audible ringing was suppressed early in the treatment process and what I am getting is now icing on the cake.
I am having thoughts about adding another sub sometime, but no definate plans right now. A DIY IB or LLT would be fun, but also physically challenging for me. I will either watch for a good used 18" Velodyne (no way on the $5k new Velo prices now) similar to the one I have now or maybe try a Hsu or SVS later in the year.