Thanks so much for putting this lighting diagram up. I'd like to suggest that there is one very simple yet absolutely critical missing piece of equipment. I have a number of them, and have used other brands before for lots of in-studio portraits. I have suggested this accessory to people who are involved with studio lighting, just exactly because of the issue you ran into with the gridded light used as an accent.
Speedotron Products Accessories
it is the Speedotron Snap-on Mylar Diffuser for 7 inch reflectors. It has three spring-steel clips that hold it on. Here is a photo of one, with light being "pumped through" it.
im_62714.jpg
Yeah, you can add a grid, but when it comes in at that "steep" of an angle, the light will be EXTREMELY hot and "specular"...when the light is moved to a more right-angle angle of incidence in relation to the camera's line of sight, the same amount of power will create much less specularity. Looking at the the diagram, if the back light is reading f/5.6 and the main is f/7.1, a 7 inch reflector ( a very small source, BTW) with a 30 degree grid is going to "burn out" any skin that has any sheen at all on it. You absolutely,positively, need to add a diffuser in front of the grid...you will literally, almost not be able to believe the difference it makes!
Also, using a bigger reflector, like an 11.5 incher with 50 degree beam instead, then fitted with a grid, and a diffuser, and some barn doors, will make the light about 2.7x larger in area, and significantly softer at the 66-inch indicated distance. A 7 inch diffuser will have an area of 38.48 square inches. An 11.5 inch diffuser will have an area of 103.87 square inches. QUITE a significant difference.