What i mean is for the guy who's gonna take over from you, if he wants a turn or two taken out of his wings, that needs to be set before you pit for his takeover.
So either he has to tell you & you gotta set it for him before you pit next OR he has to takeover, do a lap to make the f12 changes then pit again to have them adjusted.
BTW I was just thinking that it would be settable through world, but upon further consideration it might be easier to have a "teammate" box somewhere in the options screen where the lfsname of your approved takover-er could be entered.