>>1. Can you put all of the code in the "optiongroup" rather that behind the individual buttons?
>
>1. Yes, sure. Code in InteractiveChange of the OPG

Not explicit enough to stay out of trouble IMHO ;-)

Code the needed behaviour in method[s] in the group container
and call from where it is DRY - from the container as well in the best case.

Events should always call methods...

regards

thomas