This is an easier to use connection clip to attach the Azteeg X3 to 1515 series extrusion from 8020.net for the Cerberus 3D Delta Printer (or any other printer you make with 1515 series). I also want to mention that the Azteeg connection portion was made by Steve Graber @ http://grabercars.github.io/Cerberus/ and the clip portion was made by the_digital_dentist @ http://www.thingiverse.com/thing:135423 My only credit is spending a few minutes in blender3d blending 2 great tastes that taste great together...1) Print between 25-50% fill. 2) Snaps right in to channel 3) M3 (or similar) screws/washers/nuts at the corners