Looks as though this is how it failed. Not made for mixing thick mixtures at
low speed as .1mm wire for the last run of that 1 setting and over time the
wire must have brittalised+corroded from excess load current and failed at
one end where the loose tails can vibrate, break and blow out through the
housing. Continued being used but without speed 1 and at some point the
second end must have broken away and blown out, leaving just 2 tiny remnant
bits at the solder points, easily overlooked, and other break ends under the
bulk of windings , so unseen. Then the neutral connection failed and no use
after that. Will try a diode in the 1 position linked to the 2 winding