Buying a new excavator auger drive attachment. Drilling post holes with it. Splitting stumps with the cone splitter. And shaving down stumps.

 Some very cool attachments for that versatile piece. As you usually do, you set the bar high and see what things can handle by giving them the toughest test first.  The cone auger is effective, but only with certain size and maybe types of wood. The "stump grinder" was fun to watch, but omg.... that last stump must have taken an hour and a half or more in real time. But it certainly doesn't lack for power and torque.  And simple to attach the tools. Very cool.Those stump shavings might make good kindling for your hot tub water heater. Or if you come across any hickory or apple wood, could soak the shavings and toss them on the coals to give a nice smoke to a bbq.  Got a kick out of watching you dragging the pallet behind your truck from the paved road. That pallet was tough!  
That splitter will work a lot better if you go at the log or stump from the side not the end. I have the same setup for a 3 point hitch. Works great from the side of the log.  Would love to see the rock drill attachment! The stump splitter looked alright. The stump shaver looked awesome, very satisfying to watch.