After my Mavic Pro crashed into a building, its electronic innards were exposed, so I went to eBay and purchased an original DJI top cover from China (cheap, under $15.00 and it arrived reasonably fast). I also purchased on Amazon a set of micro tools, making sure they included the mandatory 1.5 mm Hex driver. Then I went to YouTube where you can find plenty of videos teaching you how to do a tear down. First mistake: you don't need to disassemble the whole unit to replace the canopy (insert sarcastic comment here). I started to disassemble the bottom, thinking it was necessary. Not a huge mistake, until I destroyed one of the bottom screws. It took me a while to extract the stripped screw, but what worried me was the possibility of stripping more of them... I was not satisfied with the torque provided by the 1.5mm bit. I tried all the bits in my pro toolbox almost at random until I discovered a much more useful one, marked CR-V T6. In my limited experience, it provides a much better torque and the 1.5 mm bit might end up in the dustbin. Bottom line, you don't need to take the whole MP apart just to replace the canopy, and I might add you don't really need to watch a long video showing you how every little screw is removed. Even for an ignorant tinkerer like me, it's very straightforward. Just two screws are hidden and you need to remove a small plate under the two front arms to access them. Incidentally, I was impressed by how beautiful this flying computer looks from the inside. 
