Dan, thanks for the reply. Other than the noise factor, do you feel the Vortex has any other redeeming qualities, such as decreased hold sensitivity or recoil?
I've not had the pleasure of shooting a tuned spring power plant. I'm under the assumption it cocks smooth but should have the same massive vibration and rotation as a non maccari tar spring.
There are a couple European sites that sell Hatsan parts. What it would take to get them shipped here I don't know, but Hatsan apparently has no problems at least overseas at this point selling replacement parts to the public. Here's 1 you can check out, it gives English and US dollar options:http://sharg.pl/pol_m_STRZELECTWO_Wiatrowki-i-akcesoria_Akcesoria-do-wiatrowek-2999.html