Eldragon,
You thought the crossover was easy? Are you sure you did it right, doing you own T-S parameter measurements for the drivers, and measurements for all the drivers, then again as a system, taking those initail measurements and using a CAD program to optimise the 3-way crossover? I'm into the speaker building hobby and there really is no such thing as an easy 3 way crossover. And I'm not talking about a crossover like one might see in car audio. Not trying to insult or question your methods, just suggesting to somebody trying to do the same that you will not even come close to a good design without doing all the things mentioned above. I recently got back into the DIY side of the hobby and let just say that in the 10 years since I last tried to do this things have become much more sophisticated. Word of advice if you want to DIY, go for a 2-way. If you really need the bass, use a powered sub. Those actually are pretty easy to build successfully. But you could get into it with a sub too, just a matter of you patience and willingness to learn.