The set was received very quickly. Of course I am very satisfied with the delivery time and the safety of the packaging. I have checked the spindle connector pins and it appears that there is no continuity between the ground pin and the spindle housing. I contacted the seller to see if pin number 4, ground, is connected to the chassis. I got an answer saying that pin number 4 is connected to ground. I had to open the bottom of the spindle to make sure it really wasn't connected to anything. Buying a check before plugging in this device can be dangerous. Only 2 stars for speed of delivery, seller doesn't advertise and wasn't honest when asked. Very disappointed!