Thank you for designing the Bianchi 9R2.
Before joining this forum I had not known this suprub holster was of your design. (In reality I had never given much thought to how the myriad of holster choices came into existance.)
Others with different body builds, carrying styles and sidearms may well choose other designs. For my M36 and M60 the 9R2 is perfect and highly unlikley to be improved upon.