What kind of polymers are you using? While the z-axis issue is certainly a concern, there are adjustments that can be made to a model and/or orientation of it that may mitigate various challenges by usecase, though withstanding “a lifetime of abuse” is unlikely even then. Lastly, if you’re concerned about microplastics’ volume entering your system, I’m betting you were raised to consider recycling as a consumer-focused solution to <insert any of myriad global issues>, like many of us. 🥲😅