CR-10 Spring Cap. ~ I thought back to a week on the Wanhao forums where some people were getting shorts from the metal springs digging in directly against the hotbed circuitry. I then saw tinymachines were sending their CR-10s out with spring caps. So I whipped up some caps in tinkercad. ~ Probably a good precaution against springs digging in and causing shorts. At the very least, put on 'Fiber Washers' between the spring and bed or a smooth washer, if you dont go with caps.

Since its contacting the heated bed, ABS or PETG suggested.

The previous issue history and Wanhao fix page: http://3dprinterwiki.info/wanhao-i3-safety-notice-bed/