Bearing spool holder should fit a variety of spools. Holder is mounted on top of the delta. There are already some good designs that bridge the triangle for kossel machines.
Also a file for a thumbscrew that fits the M3 nut to help tighten it and can be left in the assembly.
1x M3x25 bolt (will vary depending on what your mounting to)
2x F623zz bearings
1x M3 nut
He3D Delta 180
Infill can vary I used a sparse fill for the the large screw to reduce material used but not big that it makes bridging across the fill to difficult.