Hatsan AT44PCP -> Scuba Tank K Valve vs. DIN Valve ??

[SpiralGroove]

Hey Scuba Tank users,
With Cost, Ease of Use and availability as criteria, which of the two fill methods below are recommended when using a scuba tank?
1) Hatsan DIN Charge Kit $74.99 (AD) + DIN adapter and K valve scuba tank (or just DIN fitted tank).
2) Hatsan K valve Charge kit $89.72 (AD) + K valve scuba tank.

Looking for the cheapest, but also most effective way to fill my Hatsan PCP

Thanks..........Kirk

[grobe1458]

on my scuba, I have a k valve and use a benjamin fill unit that came with my marauders.
the hose is short which can make filling some rifles awkward but doable.
it's also the cheapest solution for me and it works for all my rifles