Westone nozzle molds go in tight, don't think I will be able to fit Mandarin spacers in there. They spin only because they cover a barrel of the nozzle, but anyway. I'm happy with universal shells as is
Even I who has incredibly small ears found the UM pro 30 to be one of the most comfortable universal shells I had ever tried.
(Although I eventually went with ES30 custom version).
Ever since I have not once found a model that I deemed as comfortable. While I sometimes wish the sound was more neutral and detailed for listening to classical music, I've just not been able to find a tiny IEM that does that all that much better than my ES30
I agree however that I don't see much added value in that solution with the adding bulk.
If it doesn't mold your concha, I don't see how it improves seal, sound or comfort personally but I may be wrong (can't knock it till you try it)
Edit: Didn't mean to quote you. Just curious about the added value too and leaving my feelings about the UM pro 30 shells (impressions from a guy who struggles with every over small sized IEM)
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