Ikea Lack MK3s Reverse bowden filament spool guide

I needed a filament spool holder that fit inside my lack enclosure or on mounted on a wall.

I used BIQU PC4-M10 (amazon) for the spool side https://www.amazon.com/dp/B01IB81IHG?psc=1&ref=ppx_yo2ov_dt_b_product_details

 and I used Alex Wards design for the Mk3s side https://www.printables.com/model/7978-prusa-mk3smk3s-reverse-bowden-filament-sensor-cove

Threaded insert https://www.amazon.com/gp/product/B09MTS6ZZQ/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1

For mounting screws I used drywall screws, the bolt for the knob is ¼-20 as is the brass insert

Supports only needed for the filament guide cleat, I used tree supports with good success.  I suggest printing with the threads on the build plate for accurate threads, they were perfect for me but YMMV.