i found a good way to to attack skate boards to the bike you have to install the board upside down and the hard ware up side down so the bolt tps are flush with the bottom of the skate board and use spacers to make up for the extra space when you bolt it to the forks

 oops i wrote attack instead of attach in the last comment

 yeah thats pretty much what i did i think

 spacers on the insides of the forks and then the wheels put on really tight, seems to be pretty solid! might do the same to the back!

 how is the front board attached?