Arbutus grow like weeds in my yard, volunteers from neighboring greenbelt. I love the look but on a 1/3 acre lot it would not be pudent to let them grow. I would like to keep a few as smaller pruned specimens but I am not sure how to go about it. Some are single trunked and others are multi. Should I cut the central leader? If I don't prune them I will have to remove them and I hate to do that.