FCS II Sharp Eye Tri-Quad Fin SetFCS II Sharp Eye Tri Quad Fin Set The SE template was developed by Marcio Zouvi and sits in the Accelerator Family. It was refined with the help of the elite SE team including Kanoa Igarashi. In fact, the outline is very similar to the Performer and Accelerator templates with a touch more sweep and a little less area in the tip. Recently updated with carbon tissue inlays and AirCore construction, the SE fin is stiffer than the original version