I was thinking the same thing guy's. What about the patents, the cost and warranty issues. Theoben may not take kindly to a Yank airgun retailer selling copies of their patented products. That is, if the patents still apply. IF the patents expired, then others could (and presumably will) start developing and marketing them. Cost wise, it could make most Gamo's just as expensive as a HW, Webley or RWS/Diana. Not that Gamo's aren't good guns for the money. But I think that has been one of their selling points, cost (and very high velocity #'s ) Add another $100 + dollars and the equation changes. Will the installation of the gas ram negate the Gamo factory warranty? Did anyone at Pyramyd Air bother to ask? Will PA tell customers if it does void it? Who then handles the warranty repair/replacement on the gas spring modified Gamo's, PA? Who will work on the gas spring if it fails? How long will the spring be warranteed for? A good idea, but personnally, I see too many risks and questions. If I wanted a gas spring, I would either buy a Beeman/HW, a Theoben or a LISCENCED gas ram to fit my rifle of choice. I think you would be better off to spend the money for the gas spring upgrade and give it to a tuner such as Charlie Da Tuna, et al, and tune the gun ( metal spring) and spring for (no pun)the GTX trigger. But that's just my opinion. Others may vary.
Regards
Nathan