I don't mind mate, I'm waiting on a response from seller re shipping details, he never mentioned quantities but I suggested 10+ I think. So if someone who is actually buying one for themselves this time wants to run the buy and save me the work that'd be fantastic, but I don't wanna get the hype up only to say no, so happy to see it through for AHB if no one wants to run it. But either way I think the buys viability is still subject to the finer shipping details and logistics that the seller had in mind and I won't know that until he replies.
As for difference with a normal regulator, diaphragm and orifice would naturally be smaller, so you have less force to control the pressure. Pragmatically this means when you set the pressure to a set pressure the actual control at flow can vary somewhat. For dispensing or carbonating a keg this should be negligible as the flow is relatively "steady state". But for say purging an empty keg up to pressure it could vary, but at same time the flow rate may also be less due to a smaller orifice... Probably not a problem at the flows we use for homebrew so I can't see any issues/downsides. Biggest downside would be no check valve and being closer to the keg so higher risk of liquid getting in as mentioned by grott. Personally I'll just be burping the majority of the pressure on any keg I connect this on prior, rather than stuffing about with a check valve.
This $22 SS adaptor, is this a soda stream to standard thread type adaptor?