Bob,
I have the Forte I's with upgraded crossovers, thanks to Chris's K-stacks. The upgrade to the tweeter does look interesting. Question I have is what should I expect? If the range is increased by 3k, I know I will not hear in that range, or for that matter come even close to hearing above 11khz. I do enjoy the Forte's very much, I have owned them for twenty years and have found very few speakers that can compare and none at the price point of the original retail price. I would be very interested to hear from you. I have the utmost respect for you and your engineering skills as many others here on the forum.
Best Regards
Reid