OK,
Having constantly looking for new ways to increase stability and reduce human error (me

I was looking forward for this one. So here is my take on this $300 (after shipping) rail:
Design flaw #1: after initially installing the rail I noticed a bit of left/right play at the front (which means that I did not use extra force/torque when tightening)..so I took it off and and noticed flaw #2: the finish of the filling port area is in 90 degrees angle(!) which
WILL MAR your stock. .. see below.
To address the play issue, I replaced the previous installed rail (I realize that this only applies for those of who have one) with a shim I had, which I cut, buffed, sanded, so it's tapered in the right angle to fit in the "tub" section of the rail. Now, keeping in mind the overall weight of the gun leaning against the rail, I placed a 9/16'' x3/32'' thick o-ring around the filling port to prevent any further marring of the stock. Problem solved. I also added a good rubber pad where the rail meets the bottle at the front, instead of the small built-in foam pad that came with the rail, just in case.
Pics are far from perfect, but all 3 mods mentioned are non-visible when looking directly at the point of contact of rail meets stock, and let me tell ya, this rail is going nowhere! This thing ties the whole set-up firmly together and is so stable even when resting on a couch lol. With minor improvements, I'm confident that this makes a SUPERB add-on accessory. Cant wait to test it out