i made a couple oblong slots, wide enough for a hose clamp, in a piece of wood and mounted with 2- 4" hose clamps (worm clamps). 4" hose clamps fit pretty good around the pump.
if you want to cut down on flying bits, you can just grind your grain at my house. hell, you can even brew your beer at my house..i will take more pictures next time..
mike
I always drill a couple of holes in the lid of a cooler and blow spray foam in it. one hole to blow foam into and one hole on other side for it to come out.
there is no insulation in most cooler lids.