>>2075045top left image is one of my bicycles - the tube is filed down about 0.5mm to fit into the frame. It is stuck and has become one with the frame, likely via galvanic corrosion.
I think filing the special coating off the seatpost caused this.
A custom tube won't have the correct coating to begin with.
Finished product, with any luck we wont be hitting the liveleak special
https://www.reddit.com/r/todayilearned/comments/d5mogd/til_a_14_year_old_boy_in_china_was_killed_anally/