The material we are trimming is 1 1/6” thick and clamped to our shop made jig which has a 1/4” thick base. We will be using a 3/4” guide and a 1/2” flush trim bit. The total height of the bit, with the bearing and threaded screw is approximately 1 3/4” above the base plate. Our cover guard is 3/16" lexan mounted on 2" pine.