Agitene! I also have the HF parts washer. It really helps if you install a rubber gasket between the lid and the tub to minimize evaporation...it also makes it sound like a more expensive purchase when you slam the lid closed!
Agitene is worth the money for sooo many reasons.
I built a flat rolling drawer that rolls underneath my 8' workbench. I used castors recessed into the unit so the drawer sits about 1/4" off the floor. It holds a LOT of metal stock.
Consider airflow. I put in an exhaust fan in the ceiling (built a box w/motorized lid so no heat loss in winter when off). I didn't think about it's placement being nearby the only window...fan just pulls air from window and up/out instead of pulling fresh air in the window, across the space...