Paul was servicing our greens roller this morning and thought you might be interested in seeing the underside while on the lift. You can see they are quite simple and lightweight. The larger roller in the back is the drive roller that moves the machine. In the front, you can see 6 articulating rollers that do a nice job smoothing the surface of the green. The effects of rolling are substantial, but not as drastic as most people think. 6" of green speed is an average result from rolling at Highlands CC.