With the stock Fischer single flanges it sounded like I was getting a seal, it was only with the biflanges and hybrid-like tips that I couldn't get to seal (these sounded even worse, less bass and thinner treble). I ordered a set of T100 Comply's, which should be here by the end of the week, which should help seal and attenuate some of the treble. That might do a lot of good.
To be picky, DKaz specifically mentioned the TX-100 Comply's. The TX versions have the ear guard, which I read as claimed to "ever so slightly calms the 8KHz region."
It's not clear that the T-100 would do that.
I know, but the TX series is $5 more per set of 3 ($20 compared to $15). When you consider that you have to replace Complys every month or so (probably more often for me), I'm wary of spending more money than I already have to to "fix" an IEM. After a year or so I could've just gotten a custom to begin with and not had to deal with getting new tips.