If anyone looking for an Apache collective drawing, I have uploaded a solidworks and STL file to the link below.
It will need some adjustment to create a method of putting the four sections together. I make no claim about being 100% accurate just wanted to give something back to the DCS community.
All I ask is anyone uses or modifies the drawings etc that they share them here to help others.
https://gofile.io/d/95Fmvg