Clean, Simple. Two things that few can offer with a 5 bank hydraulic system. The only thing better, is 2. The controls are mounted inside the tank so the exterior will always be clean and shiny. If you are purchasing a new Tommy signature package hydraulic units will be included. If not you can go ahead and order now. Tommy Hydraulic Units are a great power solution. The storage tank is equiped with a cover that hinges up to check leverls and make adjsutments. This allows full access to oil and controls. If there is a problem with a leak on a control or speed adjuster it leaks directly into the resivoir. This keeps a very neat clean look at all times.