just a short look at my V977 CNC aluminum upgrade kit from BG. I read a LOT of comments on forums that this kit does NOT work. I am not a the point of being able to install it yet.
But yes, it is true - it would not have worked out of the bag. But contrary to certain other people I consider it legit that if you pay only 20% of what an equal "brand name" kit would cost (completely ignoring the fact that for the "brand name" manufacturers the WLToys V977 seems to be not worthy enough to make parts for) then it is to be taken into account that there might be a need for "modding" the upgrade kit to make it work.
And that is what I am doing. So far, the main points of complaints are "remedied".
As can be seen in the video, after about 45min of sanding and the exchange of 2 ball links, everything works the way it is supposed to be. My advice "if you dont want to 'fix' the parts in case they might not work, do NOT purchase this kit" It is only for people who are willing to put some elbow grease in to make it work if necessary!