I saw this one and thought it would give filleting a hard time...I was right.

I've attempted this in Part Design only, mixed Part/Part Design (i.e. think base features), and Part only.
I've been unable to get all the fillets.
I'm willing to be proven wrong.


OS: Ubuntu 19.10 (XFCE/ubuntustudio)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Python version: 3.7.5
Qt version: 5.12.4
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/United States (en_US)