I use a 510 to ego adapter to avoid the thread issue on the Vamo:
510 Battery to eGo Atomizer Adapter - Adapters - Accessories - E-Cig Parts
The fine people on the MVP2 owner's thread recommended it.
510 Battery to eGo Atomizer Adapter - Adapters - Accessories - E-Cig Parts
The fine people on the MVP2 owner's thread recommended it.