Cant get LUA script to run

Okay, understood.
How about if I leave OSD out of the Firmware Builder. I do not use OSD.

Still not enough. Get a new FC

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The F405 simply won’t do it.

Even the F427 struggles to run the scripting engine, though it’s technically possible on some F427 based boards.

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Then I have no choice but to switch to an h743 board, right? … Thanks for the info

Again, technically a few of the F427 boards will do it, but an H7 board is really what you want if scripting is something you’d like to explore. H743 tends to be more common, but an H757 is essentially equivalent in terms of feature availability.