Reviews out of 10?

I’m currently converting my existing site (www.continue-play.com) to a new design using Oblivion (www.continue-play.com/testbed)

We score out of 10, and I would like that to continue. Unfortunately, it looks like Oblivion only supports a 5-star rating system.

Admittedly, the use of integers like 3.5 means that it is, basically, a 10-point scale, but I just don’t like star ratings.

Can I amend the review score aspect of it to suit my needs?

I’ve found a premium plugin that will do what I want – http://codecanyon.net/item/reviewer-wordpress-plugin/5532349 – but obviously if I can do it without having to pay additional money then that would be preferable.