THREAD REVIVAL!
I too have recently put new crossovers and tweeter diaphragms from bob crites in my Forte II's. I noticed a nice improvement from both. The crossovers gave them an overall "refresh" for a lack of a better word, and the titanium diaphragms made the top end shimmer more with way better harmonics, and vocals (esp girl groups) really shine.
Installation was insanely simple, it took me about 45 mins to do the entire job, and i am NOT handy with electronics.
I am happy with my purchase, and new crossovers+titanium tweeters+grado+carver 20 watt tube (borrowed) = CLEAAAAAAAN