Me too... I fully assemble prior to eTex. The professional builders epoxy before they put the lips on but many spray their clear coats instead of brushing on etex
I put a piece of folded index card in the lip slot, epoxy the plug, pull the card out about 30" later, let the plug dry, then epoxy the lip in as a separate step before I wire the plug.
If I'm using plug in rocks or heavy duty I'll put 2nd coat etex ..put piece of straw over swivel etex and [I flip] final flip is lip up .
Makes for a good seal around lip and tail
Not sure if this allows plug to dry out [water gets trapped??
2 hook plugs would have more venting