Need help with going to top of the wave

Hi Guys,
I'm riding very long board 10 feet and 23 inches wide. Everybody tells me that this board is crap (it's made by BicSurf) , but I can catch a glimpse of wave and ride. But I do have some problems with turning this beast. I know I have to go back to the tail and stomp the back leg, but still when I finish my cutback wave is almost over. I've also have a feeling that I always trim my position at the bottom of the wave and I can't get good speed.
Can you look at these videos and give me some advices about my stance, feet and arm positioning and so on. I still think I can get more from that board and do some sick turns.
Your advice is much appreciated.
I'm riding very long board 10 feet and 23 inches wide. Everybody tells me that this board is crap (it's made by BicSurf) , but I can catch a glimpse of wave and ride. But I do have some problems with turning this beast. I know I have to go back to the tail and stomp the back leg, but still when I finish my cutback wave is almost over. I've also have a feeling that I always trim my position at the bottom of the wave and I can't get good speed.
Can you look at these videos and give me some advices about my stance, feet and arm positioning and so on. I still think I can get more from that board and do some sick turns.
Your advice is much appreciated.