> I get to drilling and after 25 minutes of learning how to keep it straight and the wonders of noise cancelling earphones, I have a neat 60mm hole with a plastic insert.

Pardon my nitpick but in case it helps save anybody else's hearing: noise-canceling headphones are not hearing protection! Hearing protection devices create a physical barrier between the noise source and your ears. Noise-canceling headphones use a microphone to listen to your surroundings and create an inverse sound wave. Due to their imperfect nature (latency, inability to reproduce certain sounds, etc) they are not adequately protecting your ears, especially for higher-frequency sounds like a drill motor: https://en.wikipedia.org/wiki/Active_noise_control

If you want hearing protection and music, you want something like these: https://www.3m.com/3M/en_US/p/d/cbgnawus1754/

edit: also should have used some teflon tape on the threads of the washer hoses to prevent leaks: https://en.wikipedia.org/wiki/Thread_seal_tape