I've built the active DTQWT-MKIII's about year and half ago. Using DSP
allowed me to use flat baffle and tune it to my liking. I wanted to
upgrade the setup to passive, now that you're DTQWT conversion kit for
MKIII (FLAT) was available (with LR4 crossover).
Now that the set is according to your original plans. You're free to
include it to the build log if you want.