I have been thinking of getting one of the carto tanks, but don't like the idea of slotted cartos due to the metal dust. One vendor sells punched hole(drilled) cartos, much better IMHO. This can be done yourself, but have you ever tried to drill a small hole in a round object? The drill bit will wander off. So someone needs to make a v-block to hold the carto and a drill bushing in a jig that is the size of the drill that will firmly rest on top of the carto and keep the drill bit from wandering. You modders should be getting the picture. So how bout someone coming up with something reasonably priced to do this with for those that want to use the tanks?