I have a piece of timber 20mm thick , 2600mm long and approx 250mm deep. It has a contoured front edge and flat wall edge. I want about 80-90mm trimmed off the long flat edge, and I want the 2600mm length trimmed back to 2000mm. So 2 x circular saw cuts. Then I want the trimmed shelf mounted to a gyprock wall. There is already a full length timber stud in place behind the gyprock for mounting. I can provide the under shelf mounting brackets.