TPU enabeling Feeder for Ultimaker 2

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I installed a new feature on my Ultimaker 2 extended to accommodate 1.75 mm filament, which also enabled successful printing of flexible filament (TPU). The original setup from Ultimaker had too much Bowden tube with a curved path, causing the flexible filament to compress and create excessive friction that prevented it from passing through the print head successfully. Furthermore, the feeder design allowed the soft filament to buckle just above the pinch bearing and jam. To address this issue, I created a modified feeder with zero open space where problems could arise. As shown in the OpenSCAD drawing, a spring supports the stepper and feeder above the printer, preventing issues from occurring. This setup has worked flawlessly on both of my Ultimaker 2 printers, handling inexpensive TPU and ABS filaments for over 1800 hours of printing without any major problems.