Mike.......take the opportunity to input diffusion. Diffusion is the answer for the Vs. Front center and forward as in closer to the Vs for image, staging depth results. Explore diffusion outboard just behind and angulated toward the sweet spot. The secondaries are here and it's a lot ! First reflections are secondary and minimal in my musings. Excess toeing accomplishes nothing with these big coax waveguides and doing so only exacerbates reflection forward and REAR ! All other efforts(expense), super duper ICs, PCs, regeneration, conditioning blah blah blah, pales to well employed room treats !!!