has anyone cut their stock runners? would i run into any ill affects by drilling some holes into them and cutting 2 holes (1-1/2") together to make a rectangle? or even if i drilled 4 holes in a rectangle patern cut from hole to hole excluding the front 2 and just fold the cut out rectangle up to make more grip and a hole to let snow out. would i end up weakining my boards or would they hold up?