Hello all!!!!!

I'm in the process of building a 48'' Wildthing from some free plans I've downloaded from this web site http://www.modelpowerboat.com/RC_Boa...13_sectionid/2. One of my main concerns at the moment is that no strakes are included in the plans. Are they unecessary or is this just an ommission of the person who drew the plans??? If i have to install strakes then how many should I install??? in witch order and taking what measurements? Is there something like a rule of thumb concerning the installation and shape of strakes on our boats???

Thank you in advance,

Orestis.