I love the sanding blade idea. I've never seen that, but it is pretty cool.
I like how the speakers are coming together. Still anxious to hear how you plan on finishing them. Let me tell you that Bondo on a large surface is a hassle to do in one "mix". I learned that the hard way and had to scrape off some Bondo that I didn't put enough hardener in as I was trying to cover one whole side of my subwoofer with one "batch" of Bondo before it started drying.
Needless to say, I had to do the sides in 3 "batches" each. Should be super smooth, but I wonder how much I am gaining over the MDF surface alone.
But that is my build, too much details for me to put it in your build thread. Sorry.
