hi, need some advice, i want to clad a section of wall in my conservatory but i have no idea how to cut the angles at each end of wood..if you can imagine looking at a pyramid shape ( or triangle ) section of wall ( this is above my patio doors) i need install/cut the cladding to butt up against the conservatory roof beams which come down at an angle..is there a tool that i could buy ( called angle finder or suchlike) ? or is there another way of doing it ( i hope you understand the question.many thanks in advance .