Hi, I have a couple questions about the RE-400. First of all, should the stock eartips be enough for finding a comfortable fit? (the stock small Ety triple flange is a bit too big for me, so I think I have thin ear canals) Secondly, do any of you hear a mismatch between the left and right earpieces on the RE-400? both Rin Choi's blog and Innerfidelity show a slight mismatch in the 2k-4k range. If any of you could test this with a slow mono sweep form 1k to 5k and listen for the position that would be great. Thanks!