and actually, when sitting back and thinking about the timing aspect... i would actually argue instead that late afternoon or early evening is the best time to do a transfer. if the Trophont's do indeed all jump off in the middle of the night, lets say 3am as a reference point. Given the entire point of TTM is to wait until Ich goes into the Tomite stage (cyst), then you would highly welcome letting the Protomont and Tomont stages to pass by, which could take between 10 and 30 hours.
just a thought to consider. otherwise if you do early morning water changes, you are much more likely to transfer Protomont's over. Albeit, as mentioned above, doesn't really matter anyway. but worth pointing out.