couple things. i understand im not a enginneer so just opinions i guess for now....
please try to keep the stock flooring. i know it may not be easy with the designs of the chassis, or the material used which will take me to my next suggestion.
try and keep the frame around the same level as the rocker. theres another design out there that sticks past the rocker and although i like it, its a non selling point. im not sure if the 2 can be used togther or if those 2 things cancel each other out or what. but that being said, im excited to see what your doing and will be ordering one if its a cool design.