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.
Awesome appreciate the insight! Next time I need something weird I’ll grab a kit and chuck the rest of my amalgamation of random one-offs.