You can add or subtract days but nothing smaller. If you want to change a few minutes or a few hours, you need to just set a new time. Setting a new time overrides what was there.
I am currently a caretaker for a sub that is using the CV and we are enjoying it. We are working up to greater and greater control. I want him to be able to give me temp ownership for 180 days so he can't revoke it. But the question is if something happens in those 180 days.. How can I or do I return ownership if I don't want/can't be caretaker anymore??? thanks.
Seems like if ownership is transferred to you, then as owner you could transfer it back but maybe not. I will play with mine a bit after I get my key back out of mine. Actually I have a spare that I can play with not worrying about having it unusable for a few days.
It is fantastic that you are willing to help him out with his chastity. Wish I would have found someone so helpful.