30 wins in a row suggests lower than a 3% complication rate.
Yes, which is what I said. Did you read my post?:
Can you say much more than complications occur in less than 1/30 impressions
I agree that it’s less, but how much less we cannot say from personal anecdotes.
Speaking of what people said, OP said:
I am also aware that some people seem to take their own ear impressions which seems very high risk.
And indeed, this scenario is where most of the injuries seem to occur in earmold impressions, at least according to the readily available literature. Precisely because of the difficulty in inspecting one’s own ear canal.
Forgive me for addressing the actual topic posed in the thread, which I tend to forget it is often not the done thing here! 
You’re ignoring this member’s posts.