Thank you!

I design and produce it myself. And it has been mass-produced.

@@zhongxianglin7410 That is cool, will you make it available on one of the common global market places? (Ebay, Aliexpress, Alibaba etc). How is the tail holding, does it need a 3 or more blade tail to keep steady? and if so, is the stock motor sufficient or does it require an upgrade to for example the m2 tail motor? Anyway: great job! Ive been thinking about this for a couple years now, also have some models made in Solidworks but never got around to acutally making the head. My main obstacle was the feathering shafts and back then the materials. I'm considering printing something similar with Liqcreate Clear impact (I have that one in stock) or any other engineering resin that is stiff/strong enough for the job (Composite-X and Strong-X by the same brand come to mind)