I actually use the eGo beauty ring that came with my Protank (1) on my VAMO with the removable collar on it as well. I loosen the beauty ring just enough so that it is just above the height of the 510 connection, so when I screw in an rda or my Protank the beauty ring actually locks the tank in place. It definitely supports the tank much better, but it doesn't look great.
Agreed on the sturdiness of this connection. The PT2 was released in part to address the weakness of the 510 connection system, but I still use the beauty ring as an extra measure in peace of mind.
Disagree that it doesn't look great.