Simple spool holder for TPU spools

When I started printing with TPU on my Bambu Lab printer, I ran into a feed issue I hadn’t experienced before. Using a standard spool holder inside a cereal box-style drybox, the TPU spool would catch and drag slightly on the handle or inner edges of the box, causing inconsistent filament feeding. Bambu Lab recommended a print, but it didn’t quite fit my cereal dry box. So, I designed my own — a simple and effective spool holder built specifically for BL TPU spools allowing smooth unhindered spool rotation for reliable TPU feeding through the external spool. 🔩 Hardware Required:2x 608ZZ Bearings (for smooth rotation)Optional: PC4-M10 Pneumatic Connector + Bowden Tube (for guided filament feed)If you’ve been struggling with TPU feed inconsistencies, especially in tight drybox setups, this holder may help!