Basic blender went bad (motor ran but spindle wasn’t rotating). I wanted to disassemble to see if it could be repaired. Three of the four screws were Phillips head. I had to cut the casing open in order to discover why I couldn’t unscrew the fourth. It was a slotted spanner.
make a print with a bit of putty on a stick ?
Great idea! Much more reasonable than trying to get a fiberoptic kind of camera down there.
$30 bucks. An endoscope is $30 bucks, and well worth it.