This control horn comes in two halves for printing. The halves should be glued together with CA by aligning the 1.2mm holes and the flat surfaces. The hold may be drilled out to 2mm and still be strong enough for the application.

They should be printed in PLA, PETG, or ABS. LW-PLA can be used for 1.2mm hole applications but is not as durable as other materials. The side with the hole should be on the bedplate when printing.