Here is the long overdue v2 with fixed mistakes and improvements, there was a mistake on the grooves for the clamp, my bad! I thought I had uploaded the corrected version but I didn't anyhow that issue has been corrected also I use this effector with FSR's (hence the missing probe) when calibrating the machine I had a few crashes into the bed and I found out the effector was weak in a few points where it split after repeated use, those weak spots have been fixed; in order to fix those spots the openings for the vents have been reduced and extra material was added to thicken the wall. Also the size of the set screws have been increased to M5X8 instead of M4X5 to increase the magnetic hold of the rods. Been using it for a few months with no problems.Parts you'll need ... -2x 30mm Axial Fans -2x M3x16 -2x M3 Hex Nuts -8x M3x12 Socket Head Screws -6x Countersunk Magnets 15mm X 5mm -6X M5x8 Set Screws