I have two intriguing thoughts (at least to me). This pertains to the 2 Pi Tower models:

1) What about mounting the Piezo tweeter on the top the speaker cabinet in a time aligned version (ala BMW)?

2) What about mounting the drivers similar to the Vandersteen 1C (woofer angled slightly up and tweeter time aligned)?

BTW, where did the name PI come from? Was it from the use of the PIezo tweeter in your first famous 1 Pi?

Thanks,
BobCat