Ability to set the default Estimation field on new Agile boards

As an admin I'd like to set the default value for the Estimation field on new Greenhopper boards

As an admin I'd like to be able to set 'Original Estimate' (for example) as the default value for the Estimation to be used on every board created.

Currently the Estimation always use 'Story points' and we need to change the Estimation manually for each board created.

It would save a lot of time if that could be set as a default value on Greenhopper configuration so newly created boards are already with the desired value.