In my opinion, some can be deleted straight away, like those that were generated as "ring" but a "rin" one exists. I removed this primitive from the huge propellor part last week. SO there should be at least two which fall under this case.
On the other hand the primitives that are held, are not that many, I guess less than 30 files.
On the other hand the primitives that are held, are not that many, I guess less than 30 files.