Wow, that mod looks really great! I'll have to give it a shot when I get my Qs.
Way back when, when I had the chance to compare a huge number of <$500 cans, it came down to the DT880/600 and the K702 for me. Both were just so awesome! When it boiled down to it, the 880 really had the bass impact I was thirsting for. But I really didn't want to give up the massive soundstage, (and I realize some say 'fake' soundstage), of the K702. So I went with those, and decided I'd have to live without bass impact. Sniff, sniff... This mod sounds like it might really bring back that lovin' feeling...
On the subject of cheapy phones doing wonders:
I bought my first Android phone last year, (HTC One V - hey, I wanted an iPhone, but it was FOUR TIMES MORE MONEY, so I got the HTC. And you know what? It's not an iPhone. But it's OK, usually).
The HTC came with some expensive Beats earbuds in a classy box with lots of extras, as a special offer. They're IEMs more or less, which retail about $150 I think. They were some kinda awful. I hated them from the first listen, but I gave them a chance for a few days. They didn't improve, to me. The balance was just terrible, and sounded heavily manipulated. So I gave them to the girl who works at my phone center.
Some time later, I realized I needed some earbuds for working at my computer. I only have my AKGs (no) or my Ety ER-4 (no). I didn't really want to spend money on some Koss or an M50 or something, and then I remembered that my phone must've come with some stock earbuds also. Sure enough, they did.
I put 'em on and was blown away! They are literally amazing headphones! Clear, spacious, detailed, extremely well balanced... in a sense, they are almost like portable versions of my AKGs. Just really amazing, great quality headphones. They also come with a mic so I can make and receive calls.
Long story short here, one afternoon my gf and I were lazing around in the park, and she was using my backpack as a pillow, and she ended up destroying my little earbuds. I guess all of her tiny 110 lb. bulk crushed the case somehow.
So I got on Amazon and worried myself to death thinking that, if I could even find these earbuds for sale, they'd be a min. of $50. But for the quality, I was thinking even up to $200 would be well worth it and probably more realistic given their crystal clear and balanced sound - though I sure didn't want to pay it!!!
Well... I did find them, and they were... $5. Yup, $5.
I ordered 3 pair.
For the curious: http://www.amazon.com/gp/product/B008HL1NIC/ref=oh_details_o00_s00_i00?ie=UTF8&psc=1