I'm debating jumping on the pre-order, and since you have first hand experience with this gun, I would like to know if the Shadow 2 have the same internal components as an SP-01 shadow? What I mean is are the firing pin, trigger, trigger bar, hammer, hammer strut, disconnector, sear and cage, springs, etc interchangeable between shadow 2 and the older models? Or are these guns a completely new design with all new dimensions inside and out?