[Users] Changing Timestep Size at Recovery?

[Allen Wen (RIT Student)]

Hello,

Is there a clean way to change the timestep size in a Carpet simulation on
recovery (eg. effectively making Time::dtfac steerable)? I am running into
numerical instabilities late in a simulation and was wondering if reducing
the dtfac would help. While I am using multiple refinement levels with
subcycling, I can ensure all levels are aligned in time at this checkpoint
if it helps.

Thanks,
Allen Wen
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