For those advising against diy or any crossover upgrades. Did you have negative experience with crossover upgrades? I've been doing diy crossover upgrades for many years, these have never changed the essential character of speaker. I've only experienced improved resolution, more natural timbre with the parts I've chosen. Duelund, Jupiter, Audyn caps, Path, Texas Components TX2575 resistors, Jantzen inductors, Duelund, Furutech internal wiring, never has a single one of these parts not been an improvement over original parts.
There is no magic in most original crossovers, parts often chosen because of cost or space constraints. Crossover upgrades can one of the most cost and/or overall effective upgrades one can make.