The idea for this “jigsaw puzzle” type holder is not original with me - I have seen the idea used in a number of other prints. However, I designed this particular print from scratch - it is not a copy or a remix.
The basic concept is pretty simple - print out one holder unit for each collet you have. The units can be connected linearly, in a square, a rectangle, or any other way you want to fit the pieces together. If you acquire more collets, simply print out additional units.
Print the units in PETG using the 3mf or gcode files provided. No doubt PLA would work also, but I did not try this. In general :
I also tried printing in 0.2mm layer height, but there was little difference.
The OnShape 3D CAD files for this are here :
The author marked this model as their own original creation.