My favorite print media is Raptor PLA by a now out of business outfit called MakerGeeks. They made a lot of interesting claims for this material none of which I found to be false...strong, aneallable heat resistant. I used it for many parts on the 1/24th scale Falcon 9, my grandson Juniper Slouber and I built and flew at LDRS 37.
I also used it to print the nose cone coupler on "Thunda Down Unda" my sub-minimum 75mm rocket which flew to 34k'+ at XPRS 2019. Multiple ground tests and no issues of any kind after the XPRS flight and quite a few feet of being dragged through the playa pre-recovery. Will fly again (and hopefully many more times).
I am sparingly using a small stockpile I just happened to have when MakerGeeks suddenly went out of business (and stiffed a lot of folks who had open orders).
If anyone has any of this and i willing to part with it I am interested.
If anyone has knows of an equivalent let me know.
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The center photo also shows the bizarrely charred nozzle of the CTI M840 post flight. I am sure that whatever caused this impacted motor performance. This flight should have gone significantly higher.