I received my Combustion Chamber upgrade bricks for my EKO 40. They will not fit into the combustion chamber. The refractory concrete that forms the nozzle and top of the combustion chamber is to low to allow the brick to be slid in. I think my only option is to remove about 1/4 inch from the new bricks. My only problem is will my wet masonry saw cut through the stainless steel needles that are in the bricks. If it will not, what type of saw blade will cut through the refractory concrete and the stainless steel needles.