I was wondering about 30191 as the result of this thread on eurobricks:
So I made a little test resulting in:
30191.png (Size: 38.72 KB / Downloads: 98)
It's a bit of a puzzle as you need to register a few new donors and a template.
You do that by ether copying them into
%appdata%/LDCad/donors
and
%appdata%/LDCad/templates
or by registering a user template folder and additional donor folder in the prefs menu.
needed files are in the attached zip.
It also includes snapping info to make constructing the whole easier.
So I made a little test resulting in:

It's a bit of a puzzle as you need to register a few new donors and a template.
You do that by ether copying them into
%appdata%/LDCad/donors
and
%appdata%/LDCad/templates
or by registering a user template folder and additional donor folder in the prefs menu.
needed files are in the attached zip.
It also includes snapping info to make constructing the whole easier.