Actually, having an ERC dial controlling the xTran, yTran and zTran of the earring (possibly scaling too) fits the purpose of having one prop with fit "morphs" perfectly, much better than a morph does.
First of all, the joint moves as you intend, in a user friendly way.
Second, ERC code is far less memory consuming than morph deltas.
Third, creating extra ERC channels for e.g. Jessi or Victoria 3 is a breeze, so your earrings become more versatile, without becoming memory-heavy.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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