About this 3D model

This hot end is from http://www.2engineers.com/ and has a slightly thinner top. I finally got around to adapting it with a printed washer. The hot end works great and is very smooth. Prints well. Hopefully it will last a while. I made three different thicknesses of washers so you can get a tight fit. The washer is the red item above the white ceramic hot end in the picture.