Hi Claude,
I have a pair of Heresy II's. The recommended woofers outer diameter is a little too big to fit in the countersunk hole and the midrange horn's flange.
I found a pair of these JBL's open box for a reasonable price. Will they work for this design relative to spec's. The Vas is lower and the BL is higher than the Kappalite. Sensitivity is 96 vs 100.5