In another thread, it was mentioned that a new generation of HOG D3 is coming out without the replaceable orifice. I've just taken the TDI HOG class, and I've heard something similar from my instructor. I was about to switch to all HOG regulators, and I now wonder, for how long, from where, and at what cost I will be able to obtain the replaceable orifice for my existing HOG D3s first stages. Could someone with first-hand knowledge please comment?