The cuts will callous over and never fuse. It is possible to bend thicker port trunks. I wouldn’t recommend it unless you are extremely familiar with these trees. I have cut back water for several days, even weeks. The branches and trunk become soft and flexible, using heavy wire or guy wires you will be able to bend the branches into a close enough position. Over time slowly increase the bends. Doubling thinner wire, and using guy wires would be the safest bet and it will take a long time. But, its far less of a risk than barely killing your tree to achieve a design.