I am the guy who posted the 7.1 link on Home Theater Shack. If there is still interest in the design, I can provide the crossover for the WR MTM. As noted in the link I use a Seas tweeter, but I have done some work with two other tweeters too.
I also made a router template for cutting the baffles for the CSS WRST125 drivers that I am willing to share with other DIYer's.
Chris