The further forward you locate the board, the more unstable it will be. Placing it forward of the center of gravity--like the main spar--would be like putting the feathers on the head of an arrow.
I hinged my board from just below the rear spar. My board is only 9 inches high, but given the reports by those using them, it should be adequate. Jim Vance, Claflin, KS va...@claflinwildcats.com