Thanks for the info! Depending on how large the XO gets I have started from scratch and then mounted it behind the tweeter. My method is to glue a piece of 1/2" MFD to the inside back panel that has pre drilled mounting holes for the actual completed XO. Then I can install and remove the crossover as need. The Maestro is Jensen's version of the Advent 6003. Jensen reduced the cost and complexity of the XO along with making a more conventional speaker cabinet dimensions. From the Frequency Graph of my Maesto's, I am hesitant to jump into that design mental gymnastics as you have. The frequency graph of OEM Maestro crossover is not ideal with a variance of about 10 db between the low and the high. There is about a 6 db upward slope from 1.8K to 10K which may account for the tendancy to be a bit bright. With my old ears I can use the high frequency bump! :>) In my searching, I found an image of the original 6003 XO which I have attached for your reference. Hey, it did have Japanese electrolytic capacitors! :>)