carlsbad,
There are some in this hobby that believe if you spend more it must be better.
I've been using power tools since I was very young so I have a great appreciation for having the skill set to build your own speakers.
With what I do for a living, using power tools is not even an option. It's a different skill set but nonetheless equally satisfying to use a 40 hp router and create parts with such a tight tolerance is very rewarding to experience.
I'm building speakers cabinets with Panzerholz and making my own footers on CNC lathe. I've never seen a commercial speaker mention or show locking 45 miter joints but building an entire cabinet with this complex joint is a learning curve for sure.
Panzerholz is so dense I tap a thread into the wood to take a machine screw like you would tap metal, I do this for all the drivers instead of screwing a wood screw into MDF as commercial speakers offer.
All my bits are carbine not carbine tip as this wood will tear them up if not.