I've had experience with adding resonators vs. Heimholz chambers and the chamber do a MUCH BETTER job with drone. You just need to have the space to add them on.
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."