Richard, I have NOT repaired any of the little drones :-) but here is a great [http://books.google.com/books?id=0pNlamfjna8C&pg=PA46&lpg=PA46&dq=low+density+polystyrene+repair&source=bl&ots=ncJ5P9NlCj&sig=3Azp8Zfw8pFp7_zkvDPR1yQQwjY&hl=en&ei=t7LCTY--E8e4twe1hMSrBQ&sa=X&oi=book_result&ct=result&resnum=6&ved=0CEAQ6AEwBTge#v=onepage&q=low%20density%20polystyrene%20repair&f=false|read] about the properties and the repair. Now if that is to much ;-) what I have done in the past to repair any polystyrene is to go to a model builder/kit builder store. Those places have the proper adhesive for your situation. Remember whenever you do a repair on it, you are dealing with nothing else but a styrofoam cup material. So if you are not sure about what to use, do not test it on your drone. Test it on a styrofoam cup, its a lot cheaper. PITA to control, is it?.....Good luck and I hope it gets fixed soon