I actually find transplanting larger plants to be easier than the small ones that need to be flipped upside down, and tapped on the bottom of the pot. With the larger plants, such as yours, you can probably just pick the entire plant (including the root mass) up by the bottom of the main stem where it meets the soil and it should slide right out of its pot. I'd wait until the soil is fairly dry before doing this, so as not to add any extra weight to the rootball/soil. You can "double pot", but it's much easier to go that route when you've rigged the bottom of the pot to break away before the need to transplant arises. I wouldn't want to go at it with a saw zaw and risk slicing up the roots at the bottom of the pot. This is usually where you find an abundance of roots on a potbound plant.

Take care. :jointsmile: