I've had six Young-June Vtubes.
Three are still living, one died after three months and got pitched, and two others went wonky and were returned for exchange.
Seems that the 510 connectors Young-June's been using are way below spec in the quality of the silicon o-ring insulators, plus the assembly of the connectors in the top caps is often shoddy. I'm getting pretty tired of being a "paying beta-tester" for Young-June and won't
buy another Vtube from them.