Join Date: Jun 2006
Location: Hillsboro Oregon
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The JD 1590 can be pulled with 130hp @ 15' width, but those drills are very heavy and if the pulling tractor has any weight disadvantage or perhaps smaller tires, the 2 point hitch model should be considered IMO.
The dolly wheel hitch model has no weight transferred to the tractor and can really be an issue on hills or when traveling on the road. I personally have the dolly wheel hitch model and prefer it, but I have larger, heavier tractors and I like the ability to tow it with anything including a truck.
There are a lot of aftermarket stuff available for the JD. However, one draw back is those long plastic tubes that go from the meter tot he bellows hose at the opener. If it has to climb much of a hill, the front tubes will plug and vice versa.
The JD is the only drill I have actual experience with, so it is the only one that I can really say anything about. However, the neighbor has a GP triple disk, and I had hired him to do some planting with it before buying the JD. As with anything, there are areas of build quality that need addressed, but it really did do a nice job. In heavy residue it has less hairpinning issues than the JD.
Sunflower has a dealer network that has some local availability, but they have not seemed to make their way into my area. That may be a dealer thing more than a brand thing, but the openers on the Sunflower sure look heavy and well built.