Looks good and again welcome to the bbs.
I have the regulator/QF/gauge fitting on one of my my Rapids running at 34 ft lb and it works well. The cocking lever a la HW100/AA S510 is an interesting development although I'd be interested in how the linkage lasts with the heavier hammer spring used with a FAC rifle. As anyone of the Rapid persuasion knows the extra effort required to activate the bolt in FAC rifles is quite a bit more than for legal limit even when they are properly set up. This will inevitably put strain on the linkage.
As for the stock if it isn't available in either left handed or ambi I'll be very disappointed.