Nothing at all wrong with that.
How did you find terminating a 16mm and 10mm in a pull switch? I'm normally tearing my hair out when connecting 2 x 10mm cables even with the deepest backbox I can lay my hands on!
In fact, I hate pull switches
How'd you do them? I tape the cables together, dress the cores into the terminals really short then slide the cables back up into the ceiling untill the plates in place. Works a treat.