Hm..... I just tried the foam tip mod, and it didn't prove to be a good combination of tips. I used Comply T-400 in medium with Spiral Dots in medium, and it ended up being too snug a fit. Perhaps if I used smaller comply tips, then the tips would not bulge out as obtrusively as they did. Back to the stock small tips! I'm still loving the sound of the original intended Fidue bore size. Maybe even more than the Spiral Dots now. Both are very nice though.