I’ll do that for you
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Awesome you legend please send me the .stl when possible if you need any more details pm me
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That might not be advised. That part has a thickness of only 1mm on either side. Theoretically it’s fine, but I’m not sure of the implication of a spacer that thin.
Are you sure you can’t just replace the bearing?
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maybe he will cnc them in aluminium 
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I would just suggest that any kind of spacer go into the part that turns, not the stationary components.
A spacer on a fixed component like the axle will take the impact and rider weight load always in the same area. If the spacer is in the wheel, the impact areas are spread out. Especially important for plastics that would crack and squirm out if always hit in same area.
Biggest concern for a plastic spacer is heat. If a bearing is getting hot and gets near the thermal limits of the plastic, worst case could be bad.
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totally agree on that I would never use a 3d printed (PLA-ABS-PETG or any type of melted plastic) spacer on a wheels or on axes …for sure heat dissipation is on of the key for the spacer.
Yeah the spacer is just for testing purposes will I wait for a proper stainless stele spacer to come
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