I just got a new to me grain cart, it is a Kinze 850, I will be pulling it with a 7130 boxcar Magnum.  I can't slide the draw bar all the way in and still get the hammer strap on the draw bar, and am worried about this much load on my draw bar.  I've heard about people putting a chain from the 3 point under the draw bar, and I could also get an after market "heavy duty drawbar" for around $750.  Should I be worried about this?  If so, which would be better, the chain or the heavy duty draw bar?  I'm not opposed to the $750, I plan on using this cart for a long time.

Thanks in advance. 

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