Ender 3 main board spacer and sd card retainer
thingiverse
When installing the BL touch there is insufficient head room in the compartment for the main board, thus this thing is a spacer which increases the head room of the compartment. Also after prolonged used the SD card slot may fail to remain in place, thus this thing also has a feature to retain the SD card, if SD card slot repairs seems too difficult to do and a new main board seems to expensive
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