is there a certain tip that works with 64audio universals? 

Is there a certain comply tip that fits 64 u's?  

Hey guys,  I just found this site, and i've gotten a pair of U3 apex and im getting U6 Adels, I wanted to ask, for the u3 should I stick with the m20 or get the m15? I like sound separation and less bass, also on the U6 any recommendations if i should stick with the S1 it comes with or get the...