would think one of the fixed samson racks would work I have them on my double up you can rotate them level when you mount them.also i have had no problem with them spinning on the tube they are rock solid

My only problem is the only tube I have on the Evolution Tower is the front part of the tower which is not normally used for racks. I was hoping someone had done this and I could see how it worked.
My first choice would have been a double up tower as it's very versatile.

That hole up above the rack is used for mounting a light, I have two lights mounted there, it came prewired for lights. Not to sure those front legs would be good for any weight on them. Iv'e seen a old post for board rack that mounts on side of boat, I think islander had a few,i was thinking about one of them possibly. With the evo tower i don't what else you can do for more board storage. Roy

My mistake it was surfthis that had the racks listed in the classifieds. Roy