I spoke with Robert Lee at Acoustic Zen recently because as I was attempting to extract the crossover boards out of my speakers(Adagio), there was so much hot glue under the boards that I damaged the boards to where they were no longer functional. I asked Robert if he could sell me another set, not mentioning that I was going to upgrade the caps and resistors, but he told me that he discontinued the 3rd order crossover configuration about a year ago and is building his own 1st order -6db crossovers for all his models. He agreed to sell me a set of his new crossover boards and before I install them into the speakers, I will upgrade for sure the caps. Robert said he would provide instructions for easy installation, this time using special screws instead of hot glue.
I know this is an older thread but if anyone is interested in the results I get, I'll post back again later.