The Unipro RBA is best for easy single coil building. You can install the Unipro series coil in the OXVA Velocity Pod. Just get it as a spare part.
It also comes with a MTL airflow reducer and drip tip.
1 x Unipro RBA
1 x 510 thread adapter
1 x 510 MTL drip tip
1 x Airflow ring
1 x Fused Clapton coil & cotton
1 x Accessories bag