I used a 3005 drm on a Bessler motor base for a long time before I started using one of their processors. It worked fine. It will want to walk off the motor base you have to use something at each end of the tank to keep it from falling off. I used the chemical bottles, I know other guys made wooden supports that did the same thing (blocking the tank from wandering.
I would take the tank off the base to pour the chemicals in and out of the tank. Don't freek out if your pouring time is longer then what some people say it should be. Just be consistant with you time each time.