Make sense. Probably would have been easier to understand (or at least seems easier to me) if the only thing involved was the 'current' one. So you 'gift' RC and soon after that you start regenerating it.

Basically regeneration would only happen on the RC owner account. Never on the account that receive it. Seems easier to understand because no 'undelegate' is required.

Just to confirm what you said. If you delegate 100 RC to me and you undelegate right away (let's say in the next block) will I still be able to use the 100 RC? And you will start regenerating?