Darren, I have a P.H.Digger for my TO-20, which is the same as a TO-30, with a few less HP's. The P.H.D. is one of my favorite time-saving implements. Use it all the time.
You can easily handle a P.H.D. with a TO-30 up thru at least 12" augers, maybe bigger, never tried. You don't need position control, up and down is all you need. You can add on a simple position controller real easy & cheap if you want anyway.
Run the PHD at low RPM's, just above idle. Run the hitch up and down a lot to clean-out the hole. Keep a couple spare shear bolts for the PTO shaft. If your ground is rocky or rooty, keep your foot ready to stomp the clutch if the PHD hands-up so you don't stall the tractor. You don't need an Over Run Coupling.I bought a PHD with one of those long handles on top... never use the handle. With a little practice, you will be dropping that auger exactly on the mark. With well maintained cutters, you will be amazed how easy that TO digs holes for you. I ripped out 25 holes, 24" deep, for planting raspberries this Spring, then dug 3 holes for new corner posts, 3 1/2' deep, all in ~30 minutes. Wish there was an implement for planting all those rasberries, that took a lot longer.
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