Well, they arrived today. Here's what happened:
The white part is hard at first. The rubber core slips out easily.
The core fit over the TF10 but wasn't too tight.
The end of the nozzle stuck out by about 1mm.
After heating (1 minute in water in microwave, then 2 minutes resting in the water). The white plastic turns clear.
I turned on some music and molded the piece into my ear. The first time, I didn't like the way it was going so I removed it, put it back in the water and started again. I guess I have pretty big ear canals - I use the Monster large supertips. The second time, it fit better.
The finished product.
So, the process worked. The material stays on the TF10. The end result is pretty comfortable. Much better than the supertips. The seal isn't as good, so the bass isn't as loud/boomy. I'm not sure whether that is a problem for me. If I push on them, the bass definitely gets louder, but they will not stay that way on their own. The isolation seems pretty good, at least as good as before. I'm going on a flight this weekend, so I will give them a better test for isolation.
There is only one (potentially major) issue so far. I'm not sure I can get the material off. I'm sure if I pull hard enough, I will crack the TF10 first. If I decide I don't like them, I guess I will try microwaving a wet towel and holding it to try to warm/soften the material.
Overall, the TF10 probably isn't the best choice for this treatment. Since I have large ear canals, I was able to get the bud in deep enough to make a decent seal. With smaller ears, I'm not sure it would hold.
