All great thoughts, but I wanted to point something out. When my unit transitioned to ACCES we had a very smart LSO working at the group. He rightly predicted that the user would have to get accostomed to these new earpieces. Second, since Westone already had our molds, it was very little additional cost to order everybody stereo earphones specifically to ease the acclimation process. And yes, they legitimately helped.
If your unit is about to transition to ACCES, I would drop this idea off with your LSO. The earphones are pretty awesome--could be better with lower freq's, so if you're a full-up audiophile you prob won't be impressed, but I like them.
If your unit has already tx'd, you're not out of luck. Westone keeps all molds for 5 years; call them up--it's prob way cheaper to get a set of headphones with a ready mold. I haven't looked into it yet, but even if mine don't wear out/break/get lost I'm planning on ordering another set in 3-4 years. They are hands-down the best fitting earphones I've ever had.
Sorry for the hijack--Back to the discussion.