Adding a file header.

[Chris Böhnke]

Hello and welcome  

Regarding the file header, I think it's also a good idea to look at some recently certified parts on the Parts Tracker as examples.

Here are few things you might consider:

1. That is quite a large file, usually LDraw parts don't use that many polygons, it makes the file hard to handle.
   
2. What program did you use to export the files to .dat? Most of your triangles seem to have 5 instead of 3 vertices specified, which LDraw Parts Editor lists as errors.
   
3. This part should use conditional lines (https://www.ldraw.org/article/218.html#lt5). You can use the tool Edger2 (part of LDPE) to generate them easily, however a little manual adjustment is often required afterwards.
   
4. The understud can be replaced with primitives, to save some lines of code
   

Your parts look very realistic, did you have any existing model file to work from?