Backward Crossovers are every backward skaters’ dream and most people rush to do them BEFORE their backward “building blocks” are solid. This usually leads to a host of different problems. Remember, all crossovers (backward and forward) are designed to generate speed on corners (i.e. NOT to be used in straight lines). If you are wanting to use Crossovers in straight lines then these are called “continuous crossovers in straight lines”.
This video uses Dijana Bengez as a student displaying several common problems which I try to identify and correct. Maybe this will help you analyse your own Crossovers and improve them.
Hope it helps