With sliders it would be at LEAST ~1" higher than stock. A bit different than I expected.
It might work with a flatter seat mount bracket. The Planted bracket leaves .5-1" of space at its lowest point. I'm going to give Scott @ Vivid a call and see what he suggests this morning.
It's an all black ultrasuede GT-X. I was gambling by ordering it without finding one to try but I think I won. It fits exactly how I hoped and I think it will be really comfortable.