I reused mem2704's model. As it broke on recompute I used a cheating trick: I left everything as is, made a simple copy of the mat, hid the original mat, and used the transfor tool to turn the simple copy and shift it in place. Done
Bildschirmfoto 2019-05-18 um 10.33.49.png (12.1 KiB) Viewed 465 times
Done in Part Workbench with all dimensions in a spreadsheet.
I've collected a few dimensions at the top for change tests, all yellow cells have an alias and are used in sketches and placements. Green is for marking cells that are used by expressions in the spreadsheet. Values in white cells are for remembering the standard dimensions, changes here should not affect the model.
WindSculpture3.PNG (187.87 KiB) Viewed 402 times
OS: Windows 10 (10.0)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.16784 (Git)
Build type: Release
Python version: 3.6.8
Qt version: 5.12.1
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)