i recently picked up a pair of these and am woried that they are to stiff. wil these get a lot more flexy with use, or do they stay the same as out of the box. also will these have enough flex for park? i had the burton moto before, and i liked the flex on that. a little more stiffnes than the moto wouldnt be bad but i don't want a lot more than the moto had. baisicaly will these be good for park? will they break in with use?