I think is mainly a matter of risk assessment here.
Personally, the only occasion I could think I may need to move my hand back on the thrust levers after V1 is if we have to deal with an engine failure after V1 during a flex take off, on a wet runway with a big split between V1 and Vr, a very heavy aircraft on an hot/humid day.
If I have any doubt (especially regarding the second segment) I may elect to use TOGA immediately when still on ground, touching the thrust levers after V1.
Obviously, if that were the case, I would have already informed my colleague during the emergency part of the take off briefing so as to prevent him / her from thinking that I am rejecting the take-off after the V1.
Personally I cannot think of other contingencies for which I would go back to getting my hands on the thrust levers during climb out and below a safe altitude (except wind shear of course, that’s a memory item anyway …).
Just my 2 cents …
Last edited by EI-PAUL; 11th Apr 2018 at 17:03.
Reason: corrections