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Copy/Paste is already available for individual processing blocks as well as full channel processing and mix parameters:

Press SEL to select the channel. Hold down COPY and press the green SEL key in the processing block you want to copy (in rotary control section or on screen), for example the PEQ. That puts the PEQ on to the ‘clipboard’. Now hold down PASTE and press the strip SEL key of the channel you want to paste that EQ into. Continue holding Paste and pressing other strip SEL keys to paste into multiple channels.

Copy/Paste/Reset works with any green SEL or blue MIX key. What is copied or reset depends on which SEL or MIX key is pressed.
I hope that helps,