Well...Now you got me started!
I bought the latest & greatest aluminum racks that mount vertically rather than horizontally from proflight at the boat show.
So, they look good but...The design on them is flawed, the weight of the board causes the aluminum mount to turn which allows the board ends to either look up in the air or down at the water.
-Not to mention the boards bounce violently regardless how you put em up, they slip backward from the wind and I have had a board almost fall out while on the water.
-I've tried them in all positions, I have tightened the bolts as tight as they will go, even used a pipe for leverage to the point I was worried about the aluminum breaking!
Ready for Proflight's master solution:
They advised I put a washer or a penny between the mount and my tower to hold it into position!!!
I tried for 3 months to work nicely and patiently with proflight-Eric, but reached a point where they probably realized the product was junk so they just stopped returning my phone calls and emails.
So that's why I say don't make the same mistake I did! Good Luck