Zu103, RB250, Tecnodec..Counterweight?

Hi, had my tecnodec setup at a dealers. Only came with one counterweight, he's not sure which one it is. I assume it's the heavy but not sure.

The Zu cartridge is 14grams. What sonically would I notice if the the counterweight is too light? Should I get a super heavy one from groovetracer?

or..should I just chill out...

New to turtable tweaking/setup.. help appreciated.

Thanks in advance.
If your counterweight is not heavy enough you might not be able to set the VTF to the recommended setting. If it is too high because of the wrong counterweight it could crush the supension on your Zu.