All of mine are foam too, I have never used cork for trolling. I use to do the same with the 10' footers out front and 12' footers to the side but just recently went to 12' footers out the front and 14' footers on the sides. I use Perroti Bilt rod holders. This set up works great for me but might not for the next guy. I have heard very good things about the Crappie Wizard rods and the Driftmaster rod holders.