dude! I never thought of the sawsall! I was using a palm sander but my sawsall is much more powerful. Also, I think I’m going to have someone vibrating the form as I pour the concrete in. During my testing I was pouring all 2" and then trying to vibrate it. I was getting some bubbles out, but not everything on the sides especially. I have been using the CounterTop mix from quikrete and it has worked pretty well for me. It has a bunch of latex additives that make it screed and trowel really weird but it lays dead flat at the bottom of the form and pretty much self-levels.