I know I'm late to the party but wanted to share. I have used Quabba fins (thanks to the creeks suggestion) on my Sunova SP25 and the board went that much better....magic....

Always wanted to try them on my Infinity New Deal but I did not think they would go well with a traditional center fin.... well, I put on older Quabba sides with my small center fin the board went insane. Fast, loose, drive, lift, the whole package. Absolutely amazing. Great from 1' - 6'. It is a shame the company went out of business.