I’m using the Epro now too. Was using the stock ones and for a long time but tried the epro again after getting a new dap. The new dap sounded better with Epro’s so now there my favorite.After a lot of tip rolling (Azla Xelastec/Crystal, Epro EP01/EP00/TW01, Spinfit CP360, UM stock tips,…), I find the Epro TW01 size S the best choice for me with the Mest mkII. Wide bore, very comfortable and the short length allows for deep insertion to maximize the BCD.
With it being winter here and cold I have found a new trick that helps me with getting a better seal. I dip just tip of finger into water and very lightly coat the outside of ear tips, or inside of ear before inserting in ear.
Go real light it doesn’t take much water don’t over wet the tips a very thin light coat is all you need.