Surgical Stents for Implant Placement

I have begun to make surgical stents for my surgeon to guide the placement of dental implants in the maxillary aesthetic zone. There is some controversy over where to place a dental implant for a maxillary central incisor and what inclination to use.

I am making the stent to place the long axis of the dental implant so that it passes through the cingulum. I am locating the dental implant to the lingual
of where the natural tooth was located to preserve the buccal cortical plate.

Some authorities, though, recommend orienting the implant so that it passes through the incisal edge of the natural tooth. What are you all doing? I’d appreciate some thoughts on the proper technique here. Thanks.