I think the intent was to use the tiller to quickly turn over a new area for planting at the beginning of the season and then they expected you to use the rotary plow on a walk-behind for maintaining the rows.Around 45" (?) row spacing is humongous. Tractor with tiller width times 1.5 is really humongous. It's okay for a hobby garden I suppose, and Gravely sure wasn't trying to sell to serious market gardeners (one reason leading to Gravely's demise).
Gravely probably did do the right thing for the way the rider was designed, as a 45" tiller would have been pretty hard to handle and to get any penetration with. I don't think they had cultivation in mind when they designed it, but even for tillage it's kind of a pain unless you have an open plot where you tear all of the ground up at the same time.
A single set of wheels on a Model L or C with a rotary cultivator does a great job. I honestly can't see that much soil compaction while running it in the forward direction. There's some, of course, but it really isn't that bad.I could not imagine the rear tiller being practical for cultivation between rows. My suggestion would be to try the rotary cultivator (either with or without the side shields). I may try to hill potatoes with it this year (walking backwards of course).
Had to Google the Hines - that's a pretty neat little tractor! I'd love to get a G but the price tag is a bit much for me at this point in life.I've spent many days in my youth cultivating corn with a B pretty good units.I actually have a Hines H-1600 which is a clone of an AC G excpet it has hydraulics and hydro drive but after all I have tried I much perfer to go between the rows with a garden
tractor of course I'm down to about 2 acres of garden now and wouldn't be practical on a large field but I have almost 0 weeds and can keep going thru corn until its grown also makes picking sweet corn easier to be able to drive between the rows as some of my rows are around 250 ft long. On my tomatos I go 12ft wide so I can bring mulch in with my side dump wagon and usually mulch the row about 5 ft wide and 18" deep.