RC to RC drag and drop

Hi All,
I will like to introduce myself to the forum as a new user of this interesting suite of controls, my name is Sebastiano and I'm using cj 13.0.

I'm experiencing the following problem using drag and drop between 2 RC:

Intercepting the BeginDrag event I should be able to change dragged records (please refers to online help) througth the records parameters. So I do, but it won't run at all! Every change I do to the record is missing. It seems like a DragRecord happens just before the BeginDrag event. I try creating a new records collection and calling DragRecords inside BeginDrag event... results? twice the records in destination RC, the firsts bad the seconds good. No way to kill previous dragged records from the clipboard, no way to get a DataObject... It's driving me crazy!!!

Some explanations:
I need to change records because I'm using the record.tag to store ids and this property doesn't pass between D&D. I prefer to not add another hidden column if it is possible...
EDIT: the same code is used to manage the two RCs so I can't distinguish between them (I'm using a wrapper)

Any idea? Suggestions?

Thanks in advance for your precious help

Sebastiano

EDIT: I've tried also MouseMove event, as suggested in online help, but it fires at least 2 times causing records to be added many times to the destination RC...