Well those bits I am using are 6mm thick so they should not flex at all if very little....started by cutting them roughly to the dimensions I need and will be tacking them up in situ so that all I will need to do is put a generous layer of sikaflex on top and then put cycle wing on, set it up exact and leave to set, then I will be using several layers of fibreglass to make sure they don't come off
here is a start
