Are there any other DIY'ers who have built the Spitfires? These seem like a sharp looking speaker with interesting drivers but there appears to be relatively little in the way of project examples or comparisons against other designs. A comparison against a similar design like The Blues or, simply due to its prevalence, the OS MTMs would be informative.
Trying to avoid bothering Paul C. to get answers that, for most other designs, would be easily obtained through the forums.
For example, will these speakers work in a thin air, high altitude environment like Denver?
Just kidding. But I am especially curious how sensitive the design might be to rounding the baffle edge near the L6-4r without any XO modifications. The very few pics I've seen all have sharp edges.