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wow I think you're right, it was the PLA. I printed one of them in my black filament and it was perfect. In fact a little hard to separate the supports. I reloaded with the MG Chemicals glow in the dark filament and it started failing at exactly the point I described -- right where the single extrusions met the support. I am bumping the temp up to 235 (was at 220) and trying again and if this still fails, I'm pitching it.