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.
Your gonna need a teeny tiny grinder. Maybe a dremmel?
Everyone should have a Dremel. Damn thing is so useful.
They really are and they’re not prohibitively expensive either. Use mine all the time.
At that point you might as well just do it to the screw instead and use the normal screwdriver.