I had the vitrex, with a marcrist blade. Used it for a few months with no issues, but then one day came to some tough porcelain tiles and was cutting them, then noticed a strange smell and immediately after the blade moved and the whole thing stopped working. Turns out the motor had got so hot it melted off its moorings, the blade then dropped down, and cut a groove in the bottom of the water well, and had started to cut into the customers concrete floor!
Blade is still working
vitrex is in the skip. Currently trying to save for a Rubi ND200.