I found that some mods (aerotanks in particular) have a very long post that pushed down the pin on the MVP and compresses the insulator. The best trick I found was adjust the beauty ring on the MVP when connecting any tank/rba/etc to where it has just the slightest resistance going in. It takes a couple tries, but haven't had to pry the pin in the last couple weeks doing that. iClear30b still requires full down to connect, but at least it works every time.