Carbon Fibre 6.8l bottle valve help

Hi guys looking at the drager one, that one would of been ideal for the bottle but cannot get it due too the shipping cost. I have had to decide to buy the 3rd one has that is more or less the same. I live in the UK so purchasing the second-hand drager valve would end up costing me £60. So the specs are the same with the 3rd one and it is the regulator valve not just a fill valve. I hope you guys agree with me and I'm picking the correct one. I'm also going to purchase this whip and gauge to go with it let me know what you think of that Guys here is the link. Let me know thx

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F323299442215

Hi I checked Midland out they only do the M25 valves the carbon fibre bottle I purchased is a M18. Check these out for me please guys here are the links 

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F362519018999

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F323299442215

these two would be fine to refill bottle and fill my rifle won't they these ones are £68 for both but there is another one all in one unit just not sure if you can refill and fill with this one or if its just a fill valve, let me know if this one will work or should I just buy the 2 I already have mentioned 

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F362531037284

let me know which way you think I should go guys but I also want to make sure before ordering that I have the right parts for this bottle here is a link to the bottle I purchased just double check it for us guys has I'm new to buying parts for bottles and don't want to buy the wrong parts so let me know thx guys.

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F223309854358

Thx for the reply bigtin even if I purchased the reg from best fittings I would still need the fill station din and checking the specs on that valve. Is the same has the link I posted the one from best fittings doesn't tell you the size of the output valve for a din. So with the reg I posted from eBay is the same has the best fittings one should I buy the 2 I posted links for. Has my other question was with that reg and fill station din would I be able to fill the tank and my rifle through that setup. Has I'm going to buy a compressor also so I'm thinking on that also or do you need a different setup to refill a bottle. Let me know guys thx for all the comments it's been a great help.

I have purchased the 2 of eBay the reg and din has I'm sure you need a din to fill from a compressor not 100% sure has I'm new to buying parts for bottles. Has I have usually bought them has a package with everything. So I hope I have bought the correct parts to fill my rifle and to fill from a compressor when I purchase one shortly. But the for all the help guys i needed the advice that I had the correct sizes to order. But let me know if I have gone the correct way to be able to fill the bottle up from the compressor has well has my rifle thx