Plain and simple: stick with a desk top deco planner---cut tables---bottom timer or computer in GAGE mode,,,you won't miss.
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Rick Murchison:If you want to use the VR3 as your dive computer then the VR3's plan is the obvious choice for cutting your backup schedules.
Write 'em down.
Write down the schedule for deeper & longer, shorter and shallower.
When I'm doing any multi-stop deco planning I have several pages of hand-written schedules in my wetnotes with the plans that bracket my intended depth and time (with the exception that I do not plan "deeper" if I'm diving where there is no "deeper," like many sites in the Gulf). Those schedules include contingencies for lost gas.
I sense some apparent reluctance from you to writing down five or six schedules and carrying those along; my advice: do it anyway.
FWIW, during ascent I have the written schedule there in front of me along with the computer, and follow the more conservative guidance unless the computer gets unreasonable.
Rick