I'll keep looking for the post ...I get so lost in here anymore..I reply to posts, then get lost trying to rememebr where i was !! Basically he ran two 2x4's thru the middle about 12-15 inches apart and suported them with vertical 2x4's on the outside. the verticals in the back of the tank were up close and flush with the tank and the verticals in the front were far enough away to allow for the install of the sump. It was a large tank also if i remember. If you think about it ....the rear support can stay so all you removing is the front one....so ithe 2x4's should be plenty. Best i can describe...hate to see ya cut the sump up!