I purchased 2 engine stands and only used one. Used a saw horse for the tail and it worked fine. Not sure how you would use two and keep the centre axis of the fuselage centred. I thought it would put undo stress on something, likely the tail.
I offset the centre of the engine stand slightly on the firewall so it would clear the floor when turned on its side. I could turn the fuselage by myself without any concerns. I used hardware store bolts through the holes used for motor mount. Used the lightest engine stand from Harbour Freight.