I run a four inch mini. Not built as tough as the proline. You will start to have issues with the frame, etc. Also had the sluice matting start bubbling up on me the second year. Nothing that duck tape, baling wire, C clamps and some glue can't repair. I'm in a remote area and on a small creek. So the portability is nice. My advice: If your going to run hard, I'd get the proline. If not, save some bucks and get the Keene mini.