My Whip is cut slightly past center so the strike plate is right on center and it needs at least 10 pounds spine over draw weight. I built the shelf out instead.
I shoot only wood arrows and much prefer paper tuning. It tells me clearly what is going on with arrow flight, is easy to interpret and is not so critical of form. Tuning close, like 6 feet, works best for me. There is great paper tuning info on the Elite Arrows site.
OS90, if your Whip is cut to center like mine, for a 29" BOP arrows and 160 point, I figure 75-80 lb spine shafts. Do you want to try some test arrows?