When I am the end user I really like "easy" when it come to repetitive motion - the minimum amount of effort to complete the task. I do not see any advantage to drag'n drop here; instead find it a more cumbersome procedure compared to a click-based interface.
Note: the demo below is not fully formed code. It is intended to show the concept.
The "Click Interface" project: textTransfer_JHS.hype.zip (23.5 KB) - Demo here.