A unique solution to the comb filtering issue would be to mount LT2 tweeters in the center of each LT10 with a special bracket, and time align them with DSP. This way the acoustic centres would be 0” apart. The baffle could be much skinnier as well.
That actually doesn't work very well. It really disrupts the response from the surface and edge diffraction.
There is also no way I would produce a speaker of this level with DSP in the signal path.
Mounting then side by side aligns the playing surfaces and gives them great time arrival. So in this regard they are already great.