Hi all!
Merry Christmas

So I bought a SUP (1st ever, first paddle yesterday) and it was very wobbly.
I noticed that that on the website, it says it has a "large centre fin"
http://www.raglankitesurfing.com/luke-short-designs-/162-simon-anderson-rdp-9-6.htmlBut mine doesn't have one at all?
As I'm using it for lakes and creeks etc, or flat sea - I believe I need one?
It currently has four little ones.
Question is, do I need to get them from the manufacturer, is there a type/size or will any work?
Thanks in advance ????