Great job on that stone and the logs dude!!!
Wobble on the yoke, probably a couple of things. If your yoke is not sturdy it will make the wobble worse, that's first. Second, your core is probably weak and it's just not used to the load. The only way to get better at heavy yoke is to train it. Try just picks and holds with a weight that is above what you can walk with. Hold it for as long as possible. Also do longer runs with lighter weight to get used to the event and moving. Good luck, keep going!
Monopoly