Re: 7 iron 72" deck
Hi Billy,
I have a tractor set up very similar to the one you are getting. My son and I also like to fly RC planes and helicopters. We prefer the electrics these days, but have a few glow fuelers as well. The Lipo batteries and brushless motors have been the best things to come along in years.
I'm sorry, but I can't tell you how short the 7 Iron will cut as I keep mine about 4". Nor do I have any experience box blading a gravel drive. But I suspect it will work quite well if you catch it when it's not too wet or too dry, but that in between state where it can be easily graded. My 3320 will pull a 60" BB full of anything without even grunting.
Best of luck to you.
KB
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