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What firmware are people using?

I would like to use the UM2 extended + firmware. I have extended the size in theory to be the same size as the um2 extended.

I see the firmware online but it seems it needs to be a little customized to work on ramps 1.4.

Part of this would be to have the same menus as the UM2, etc. even at some point I might replace the lcd with an oled since it looks so nice.