this is an upgrade for the ultimaker to speed up your prints.you might freak out of this idea but it helped me alot I went from 100mm/s to 225mm/s (for simple objects) and I went from 80mm/s to 150mm/s (for complex objects)I spray oil in the bowden tube of my Ultimaker...... yes I do.The Ultimaker is very fast because of the light weight on the hotend (as you know) But this comes with a down side, because at high speed the frixion in the bowden tube becomes bigger and this leads to filemant grinding.To get the frixion away you need oil in the bowden tube but NOT on the extruder gear.the oil did not seem to affect the print itself-Small objects won't work at these speeds because the Ultimaker can't cool it that much yetI am going to make a Snap-on version of this!!!Please read all of the instructions before doing anythinghttp://youtu.be/ov3Zt5FnCnI difficulty print *** Print support material: YesThe things you need: 4x M3*10 screws High Temperature resistant thin oilThe oil I used whas for my airgun: PTFE-/Keramik Coat. Temperature resistant around -40C to +750C but you can try different brands.Make a small hole in the top of the bowden tube. But be gentle. you don't want the filament to get stuck when you push it through. A small hole is good!!! look at the picture to see what I meen.than on top of that you screw the Lubricator on.Only spray while you're printing!!! one spay should do.and your done.Don't forget to make the temperature higher. I'm printing PLA 150mm/s at a temperature of 240C!!!One last tip..... don't listen to the screaming noise of your extruder ad higher speeds :D