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Awesome! Busy building one.
Do you have to print the Grooved half ball side down. As in the same way it is prepared in the file? Or should you flip it around to print the same way as the Tongued half?

My Tongued half stopped printing at about 90% of the way due to a thermal runway warning. Am trying to see if I can print the missing part and glue it on. :O Lets hope I didn't waste so much filament.