Hatsan tank questions

[rotorwag]

Field Supply has Hatsan tanks on sale.  I couldn't see the labeling in the pictures on their website so asked them.  Apparently they are UN tanks instead of DOT tanks.  A little brochure they forwarded me from Hatsan indicates the only difference is in some basic markings (duh) and there is the possibility of having taper threads or straight threads, so marked.  Tanks are sold with a gage so that doesn't seem like an issue to me but I'm new to cf tanks.  Says both are ok for transport to, from or within the USA.  Anybody have one?  Is it ok?  Can you get it filled like a DOT tank?  Anything else I need to know before I bite on this sale deal?

[Doug Wall]

I found this, which might answer some questions.
https://allsafe.net/wp-content/uploads/2018/01/ISO_versus_DOT_Cylinder_Summary.pdf

I would check with your local place where you would have the tank filled, to make sure that they will fill for you.

[rotorwag]

Good info and advice.  Thx.

[rotorwag]

It arrived nicely packaged and in good shape.  My first tank so smaller physical size than I expected.  Came with valve, hose and 2 gages.  Local dive shop checked with Hatsan directly and said they can fill it for $6.

The markings on the gages seem pretty small and imprecise.  I'm used to filling my gun by the larger gage on my pump.  Anybody got any tips on how to get the same pressure in my gun (unregulated) as I could with my pump?  (The gage on the gun is pretty small too.)