I have to say, my OOB impressions of these were pretty negative, great tuning of the bass and mids but really compressed soundstage (no height, width OR depth) and dynamics, barely better than mh755 and about on par with VK4 (with worse dynamics), and definitely no BL03.
Luckily they take to modding even better than the Blons, so for anyone who's worried they got stuck with a lemon and has the tinker gene, (self) help is at hand
Problem: the effing damper, as usual. It's like a brick wall with some holes drilled in it - take off the Mele's and you'll find about 12db+ of extra mids and a big chunk of treble waiting for you, way more than any one could possibly want, but it's clean and uncongested, clear, expansive etc, and whatever's going on with the DDs built in acoustic chambers is definitely working - my drivers seem perfectly matched, imaging is great (separation not so much, but it's a minor point).
Getting back to the original tuning (or a more mid centric one for people who prefer that) without crippling the technicalities again.
EDIT (I needed more bass): Take 1 of these high density tuning cotton cylinders (or 1 - 1.5 - 2 low density filters if you want boosted upper mids) here
https://a.aliexpress.com/_mPFyjrH and insert them into each nozzle, being careful to keep them correctly oriented, then find your narrowest bore tips (Sony style worked for me) and enjoy the results. The cylinders will stay in place through friction.
Now they're a Blon upgrade!
PS build quality and fit are fantastic, if they hadn't been I would have just chucked them in a drawer with all the other dead memes and moved on.
PPS it's worth picking up all 3 types of the tuning cotton, I used white low density, the black low density ones are new, I can't tell if they're any different but you may get even better results using those. The theory behind using foam over fabric is that it minimises reflections back into the shell.
PPPS Stock filter removal - use a safety pin to gently lever them off the nozzle, and store on a piece of baking parchment to preserve the glue