Poor-sha

In the past you have answered questions about the center rubber deflector that is only present on C7 base and Z06 cars without the stage 2 or 3 aero. However, what is the aerodynamic effect of the smaller side deflectors that hang under the splitter in front of the front tires (seen below)? They have been described on the Camaro as there to increase front downforce but it appears as though on the C7 ZR1 these are only present on non-ZTK cars. Do the deflectors increase or decrease downforce and can they be used to tune front aero grip? Also, is there a likely aero benefit to using helicopter tape or an equivalent to cover over gaps in the front underwing like the recessed bolts and the radiator supports? As always, thanks!