Was chasing a creak, went through the usual troubleshooting and checking all torque points / greasing up etc and even swapped out a spare crankset and the creak was still there!
Pulled the saddle inspected it and greased it look fine.
Then one night in the right light/angle I noticed a crack in the seat post saddle mount insert.
My only saving grace was that the BB had to come out at one stage anyway as I had a loose rivet head bouncing around that refused to fall out of the seat post opening.
Now the fun of trying to get a replacement... Polygon already told me they aren't able to help and to contact the store who haven't replied to me in almost a week.
(https://i.imgur.com/yv07Nf4.jpeg)
Good luck. I have heard of a tribe that chooses to cycle without the saddle, only the seat post. But it's quite a lifestyle, I would rather get a replacement and keep using a saddle.