The Pro models are simply different then the T-6 in the way they operate, the name Pro does not imply its better or designed for professionals. I use a Pro 8, I would really like to try a T-6. I have an old Pro 8 video which is actually what sold us on the product. The Pro models use a double roller with the bottom roller having multiple 1"X1" bars welded the full length of the roller, in our case, 8 ft long. The upper roller is smooth and of the same diameter. Both spin deflecting the material forward. The gap between the rollers is adjustable. Operating it takes a little practice, but no where near the effort of operating a boxblade efficiently. I ususally go through an area with my boxblade and rip it both ways. The soil being moist is best. Any clods the rippers make (lots of them) are eliminated by the Harley. IT IS AWESOME! We've had it since 1993 and it still is working beautifully with only two springs being replaced at a cost of $4.50 per spring and $8.00 shipping charge. Rat...