Tubing blocks - Aluminium vs wood vs 3d printed PLA

I’m looking to get some tube blocks to make my life easier and was wondering what material people use for different tube blocks applications. I know wood is mostly used for hand mitering and alu for use in jigs and milling machines. What about 3d printed? Do people use them for hand mitering? Or for fixturing? Does it hold up to heat in a tube when tacking?

Would love to learn more,

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I just finished printing a tube block for phasing bends in handlebars. I printed with PETG. I find PLA warps too easily with heat/uv.

I’ll press in some heat set inserts today on the block I made. 20% infill with 0.2mm layers. Seems pretty solid. Takes about 12 hours to print a block.