(Yesterday, 10:46)Peter Grass Wrote: Although they are compatible with regular pin holes on other parts they are there to reduce plastic shrinkage as the part cools out of the mould so aren't modelled. This sort of stuff is done to improve the clutch power of the bottom of parts. This is also why older versions of the parts don't have them. Also since there is the hole that part can flex more when you are taking the parts apart so they last longer.
If you really want them in the parts then use the lego builder version of parts which do have them or add them manually to the existing ldraw models with ldparteditor.
Thanks for the explanation.
How do we know when something is done improve things like "clutch power of bottom parts" and not a functional choice?
I'm curious, but fair enough if this is just something obvious if you are a building engineer or something like it - which I'm obviously not
What is the "lego builder version of parts"?