I have a few suggestions. First instead of using a drill, i find that a soldering iron makes cleaner holes in plastic tubs than a drill! Also i like removable perches so that i dont bother my chondro's too much, and it makes cleaning a breeze, i solder holes for the rod holders and screw them in! Im adding a few photos for you! The rod holders you can get at walmart! Soldering iron at home depot. The perches i use are crape myrtle branches i cut down around my apartment complex late at night (our secret).... Hope this helps.