i am trying to find an esc fan for my vxl esc for running in the sand. i had the vxl cooling fan and it locked up with grit adn stuff. where can i find an esc fan that wont lock up like that. I am also looking at the castle creations sct race pro. it has the mamba max pro esc and the 1410 motor the esc has a built in cooling fan and im not sure if the esc fan will lock up when i run it in the sand.