Homage to Wotafa for his always energetic and enthusiasm in his toys review... Bought from Taobao... Surprisingly, the spinning gimmick is already quite loose, looser than the one seen in Youtube clips... However, I still decide to make it more free-spinning... Tried adding some lubricant oil from Daiso, but the oil tends to leak and spread, making the toy oily, hence decide to only change the spring to a weaker one. Works in the end. Also added a spring to the cover-flip mechanism to make it less prone to flip out when swing hard. More pictures are in blog.
Added another spring to make the cover-flip tighter...
Replaced the spinning clicking mechanism spring to a softer (less strong) one...
When I first ordered this, the seller sent me a Berotha Magia Progrise Key, which I did not return as I quite like that Progrise Key. When I received this 2nd time order, I was pleasantly surprised to find that it is a Metallic version! Quite glad I ordered the 2nd time...