I like it!
Honestly hurting for cash right now so take my opinions and questions as that of just a dreamer right now...
but what size dovetail are you cutting for?
and can the dovetail groove for a large front sight be added to front pump handle in case we went with our own feed tube?
(like one of those large blanks that you file down to fit your specific gun's point of aim? OVERSIZE DOVETAIL FRONT SIGHT | Brownells
The one I see in my head would be stock cci feed filed to be a cramNjam, dsp grip/air and dsp v2 pump kit.