I fired the Thirty up the other day as our D21 Allis we usually use moving engines around with the pushbar wasn't home.
The reeves was all she wanted. Had plenty of power but when the reeves hit the soft grass it made her "talk". That reeves takes all the power a 6 plow tractor can make just to push it's self along in plowed ground. Weighs 35,000lbs dry. Holds well over 1200 gallons of water in tanks and boiler when at capacity.
Love that little crawler as it hasn't been started in 6 months. Primed it and she busted off on 3rd pull.