Chinups today: 3 - 2 - 2 - 2 - 2 - 1. Five minutes between sets.

If I don't do these from time to time, I lose the ability to do any. I had been mixing them up with my press-ups, but that must adversely affect the second exercise.

If you can do 30+ press-ups, then, according to rep max charts, you should be able to do 1 one armed press-up. Have you tried it?