That is very interesting to note that material MATTERS. I think that’s my prob: I seem to be allergic to all but the boring double-domes in silicone. I was just surfing a post on this topic that mentioned Westone custom molds. I jotted down their phone number and will call to ask about materials used for someone like me - highly allergic to molds and ears that swell up and down during the day.
Keep us posted on your sensitivity to the new molds … I agree that a handle seems infinitely more practical than the pathetic little “thread” that’s supposed to haul most of these custom molds out of one’s ear. Like a tiny Fiat towing a MOBILE HOME. Tow bar’s gonna break from stress alone.