Oh really??? Send me a set ASAP!!! LoL Just joking. Yeah I read that from your previous impressions, so i tried the FX40 foam tips on the 70s. Made it less bright but something about the sound doesn't seem right to me so I went back to using the auvio tips (guess it's the less deep insertion with foam tips?), was using the smaller orange ones before, but changed to the slightly bigger red one, much better fit. Yeppp the auvio tips does open up the sound more, and that's why I like them. Have you tried the FX40 foam tips on your 70s and are they different from the R1s foam ones?
I compared listening to this song. The bass is cool in it. The song might be a bit heavy for you though - I know how sensitive you are :)
With the red tips (somehow pried) on the 70's, it is overall too bright for me, and thinner sounding, and lacking bass. Yes, they open up the 70's, but I'm not sure the 70's need opening up! Quite a positive difference to me when I put on the R1 foam tips - they transformed the sound to a more fuller, bassier, balanced sound - but still with adequate details for me. Makes them sound a lot more similar to my xba3's than dis-similar. And I might be hallucinating, but I enjoyed them more than the mh1c's on that song.
I don't have the 40's any more, so I can't compare the tips. This may (and probably does) all come down to personal preference. Or maybe I'm just going insane - I wouldn't be surprised lol!