Thanks for the post, Pete. If I sparked your imagination or provided helpful info then, at least for my part, "mission accomplished".
Haven't been building speakers lately, but rather remodeling other's homes and up-fitting my own shop so I can play there more and work on-site less. My interest in speaker building seems to ebb and flow. I guess that describes my whole modus operandi, generally speaking.
Among recent additions to challenge myself with has been a much bigger CNC router. A beast by my standard, but mid-line in the industrial world. The remodel I'm currently nearing completion on was such that I could cut all the kitchen cabs on router. It just amazes this old analog guy what's possible and learning the ins and outs of design software can be both maddening and rewarding. Fortunatly I like learning new stuff!
Even though I haven't building much in the audio world, it' never far from my mind. I have many ideas that I hope to execute and I'll be sure and blog about here if it's of interest. Some may even be audio related