Longthorne-
Hello and welcome! I just received your literature and am very impressed. Indeed, your manufactory seems to be ideal to produce fine machine-made guns since you already have the very expensive machinery and the talent to design and execute.
I'm a bit puzzled by the recoil thing - I don't know why a 20-bore should have a lower recoil if you're shooting the same load at the same velocity as in a 12?
Also, it's not entirely clear how you choke the barrels. It seems you supply removable chokes but also have fixed-chokes? Some of your literature implies that there is something unique about the way the barrels pattern - am I misreading? You intentionally have short forcing cones - why?
Can you put some pictures of the insides of the locks on your website?
I have never owned an O/U but your gun may change that!