If you like how they sound, that's what matters! Plus, it sounds like an easy fix if someone finds these too colored. It would be pretty cool if you could find a way to make these "fixes" more modular and less of a DIY kind of thing. You know, like include parts that the user could easily pop in and out quickly and easily to change the sound. Not sure how you could do that, or if it's even possible.
Does Tyll have measurements ready to look at?