I read reviews for ear pod upgrades on the net and bought a Sennheiser CX 300 as being the best choice within my price range. I can get my right earphone to fit with the smallest rubber thingy, but the left is quiet and falls out. How do I adjust my fit? One complaint I have already is that I can't determine from the shape which is left and which is right - so I need to put on my reading glasses to read the small letter. It wouldn't be hard to make the two buds look different - maybe with a white band.