I do remember Keith saying he thought the Sachse build quality a bit iffy, and i did have an unexplained faiure not long after fitting..misfiring...not sure what that was but had the pickups switched from optical to Hall effect. No issues in many years. Not cheap though, and i believe the whole generator is different now, when i bought from Red it was an adapted Kwack 250 i think which is great , but now even more powerful i believe.