I'm putting down a modular hearth pad as shown in this picture, which has three connecting pieces (two shown in picture). The pad will sit on top of plywood, which will be on top of my existing wood floor. As the pad sticks out pretty far into the room, I am hoping to be able to remove the third piece (in front of the stove) when not in the heating season in order to get back some of the wood floor for part of the year. In order to move this piece out without scratching up the wood floor, I was thinking to put furniture felt pads under that piece of plywood (just the part under that section of the modular hearth pad). The hearth pad is more than double the R value required for the stove. So, my question is, is it safe to put furniture felt pads on the bottom of the plywood that will be between the hearth pad and the wood floor?