Hi !
The C8A3 based pn the Viper M4 is nearly finished. The outer barrel is been modified as we speak so it will be installed soon but I don't have it yet.
My RS Elcan has received its green rubber sleeve so it it is now a C79A2, well extrenally speaking since the mount is still a C79 one (not too important as both bases are externally identicals)
Then a Canadian PRR H4855 modded. The internals of the PRR module has been gutted and rewired for my Cavalvy set and my Motorola radio. Works like a charm and is externally correct
Hope you like it !
As for the earlier question, the custom receiver was around 200usd with port included...
Vincent