I have one of the Ultimate support Studio organizers...It works great. However, it keeps wanting to tip backwards. I have it rested against the wall...But I'd like to have it rest properly on all four legs. I don't want to rearrange everything(monitors, monitor, mixer etc) I have these old ankle weights that I put towards the front legs of the unit and it helps but it's not solid...What other type of weighting can I use to counter balance? Preferbly Cheap?