Some things changing ear tips may be the last thing one should consider - but for me KT02 can be the first thing to start. I love this eartips as it widens sound stage for my case, and fits perfectly with CCZ CZ10's longer nozzle. What's great is that as it is very elastic (sticky) it tightly fits in my ear. Of course the down side is for me to keep it clear often, but that's a small price to pay. I highly recommend KBEAR KT02 for IEM with longer stems and users that needs all tip size to see which one fits the best. to my surprise I am using XS and S as the nozzle can go quite deep..