Pruning dilemma

[murdog]

I did a bunch of pruning today but was not able to reach the tops of some of my apple trees. Most of my trees are on b118 so I was expecting them to get pretty big but now that they have I’m a little concerned about being too high on the ladder- this old age thing is creeping up on me!
So my question is can I top them (they are mostly central leaders except the few that got away) or should I just get a bigger ladder??? Trees are reaching 15-16 feet now. 11th leaf
Thanks