Not sure if this thread has been resolved yet, but the OXVA Velocity has been quite the treat. It's thinner than most pods I've gotten so far, and has zero leaking. I've had the RBA attachment on there for a while now but puffed the pod for probably 500 or so times and there was zero leaking. For the RBA, there's a small amount of condensation from the airflow since the inlet is where the connector pins are, but for the 400 or so puffs I've used it, I think the small amount of condensation over the entire span of use would still be considered no leaking. It vapes astoundingly well, and can hold a 207/217 battery. The RBA on it is very impressive as well. Probably my favorite vape pod to date.
My only real complaint is that the pod only holds 5 mL, but with the RBA and a higher ohm coil, the lower wattage and juice use extends out quite a bit.