Used Jacobsen GA30 ride on aerator fitted with the following:

Engine: 18 HP Kohler Command twin-cylinder gasoline engine.
Working Width: 30 inches
Quad Tine Heads
NO Turf Guards
Aeration Depth: Up to 3.75–4 inches
Weight: Approximately 1,300 lbs
Tine Types: Compatible with hollow, solid, slicer, and cross tines.