Tpu jams just like everyone else is reporting above the extruder gears shortly after starting a print. Firmware has been updated, vref set at .5, and esteps calibrated. Have tried running with retraction between 0 and 2mm. Have ran with multiple idler tension settings starting at e3d recomended and down to no tension at all. This thing ran brilliant for a couple hours then it can hardly lay down the first layer without jamming. I bought this solely for the pla like print speed of flexibles like the video proclaims and it fails miserably. So e3d how are you going to make this right? More importantly when, I see unansweree threads on this going back weeks.