I always wonder why one of these tethering regulators are never brought up in treads like this. Especially if one were to go with a tank first, and be dependent on fill shops down the road that charge $5-$20/fill. In this game, Air is gold to us, and you all know it. With out it, the budget guns all the way to the immaculate Daystate and FX guns are just now gardening tools. These regulators save air, especially when target shooting off of a bench or tuning on a rifle over a chronograph.
When I first got my Marauder rifle when I started this hobby almost three years ago, I knew the hand pump was not for me, so I went with a tank. Just trying to tune the Marauder I noticed after a few shot strings over the chronograph, my tank was ready for a top off, and that’s in half a day! That meant driving 40 minutes each way, and $9 to top off. Not to mention fuel. The biggest waster of air, is bleeding the fill hose after a gun top off, and you all know it. My suggestion to the original poster, is a tank along with a tethering regulator, provided you have a fill shop nearby to make it a “fun” hobby. If not, then I would go for one of the 12v/120v portable compressors, more than likely the Hatsan Spark, which I have never seen any complaints about. Not one so far.
yes, you can shoot tethered without a Regman regulator like I own, but just like shooting unregulated, your velocity will fall off, and you will not be consistent in the tuning process, unless you constantly monitor the tanks valve to keep the fill whip topped off.
Just my take on things.