I installed a similar adjustable base from Breeze. It raised and inclined the seat a little. My hands are too big to get at the adjusting nuts so the seat is positioned all the way back. One thing to consider. I'm 6'2" and with the seat lifted off the floor on the adjustable base, my sight line when I'm sitting in the car is through the top of the windshield frame. I find myself slouching a little to look through the windshield. Also, the angle of my windshield is set for the installation of the premium top.