I saw one on here along time ago, that was narrow enough to fit down a wheel track or 30" rows. Couldn't find anything searching here or on Google. I thought it was a manufactured machine and not just a one off deal that someone built. If anyone has a name for a company, I'd appreciate it. Thanks JR.
I should have mentioned it's just a small wheelbarrow style unit, that could carry a tire and a gearbox.