Wilf

Hi, Good, interesting post this, as I'm planning on building these speakers as well. On the topic of MDF expansion due to moisture, I found in this thread diyAudio Forums - A 'how to' for High Gloss Finishing - Page 1 that someone mentions sealing the MDF with wood hardener, such as you would use for treating rotten wood in a window frame. I used it on the MDF subchassis of my Shigaclone, and apart from getting stoned on the fumes, it really does harden the MDF well, prior to spraying.