I'm trying to create a custom form that I will send by email after X days order and there they will be able to put rating stars for the delivery, the experience with the store among others. Can I use magento rating reviews or I'll need to create customizations around this? I mean, can rating review only be used for products or can i use this for what i need? Because I don't want to have to calculate the star value to get the rating average since magento already has that for product rating and I just want to take advantage of that logic. Can anyone tell me or show me how to do this?