Kudos to the Mandeeps team for their awesome suite of modules.  Please consider adding some admin side voting control settings to allow more flexibility in managing community requirements. Our internal community doesn't require negative voting (ratings below zero) and it would be helpful to configure settings in a way that would prevent negative voting.  For example, a configuration that would allow users to down vote an item ONLY if they have already up voted that same item (question) thereby letting them REMOVE their up vote while also preventing negative ratings on the item.