I bought my 6'0 firewire dominator (#91764) used about 4 months ago. I let my friend ride it and he noticed the board felt 'soft' on the deck compared to his PU board. Mine is the FST built to fly model. I set down my board on carpet and gently stood on it and I noticed the board had more give than my PU board (which I also stood on gently right after). What can I possibly do>