Ok...so I've been trying diffrent methods and this is the best for my ears at the moment. So, same as you, I find TC a lot more comfortable, sound better, and as better isolation than stock Hybrid. On the other hand, stock Hybrids seal a lot better and brings out the treble (TC brings out the bass) but isolation sucks and somehow it hurt/itch my ears after a few hours. Finally, yesterday I tried out a method from another thread here - to add foam into the silicone. But original method uses comply foam (active series) that are too soft or porous and end up didn't do much for me. I love Shure olive and had a couple spares so I decore and put the top half of 2 olives to fit under stock Hybrids. Man....this works so well for me that I have to share it (after a whole night listening of course). I've had the M9 for a month or two now so here's my limited experience with tips (source = ES100 or M0 or A&K Jr.; stock cable, FLAC files): TC: more bass, comfortable, good isolation, a little bit roll off on treble, lose seal easily for me Stock Hybrids: more treble, less bass (it was noticable), comfortable, easy deep insertion, seal well, isolation just ok, less....musical Spinfits: noticably more highs (too much for me), good seal, comfortable, make them stick out of my ears, isolation suck Comply TSx: lots more bass, lots more isolation, make it a lot darker, not my taste, sooooo comfortable (but I ain't gonna pay that much for tips in the long run) Modded (below): more bass, more isolation (more than TC, a little bit less than Comply), I can only hear a tiny bit treble roll off (worth the trade to me), seal very well (so much that if you push too much there will be pressure build up). I need to spend a few more days with this but for now, I'm very happy with this.