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With all respect, I think the MKS TFT28 modules are unreliable garbage - and have been a source of frustration for many JGAurora A5 and A3S owners. Plus, they are closed source, which is only making your printer more proprietary, and less customisable down the track.

If you would like to upgrade the motherboard, I would suggest that it could make more sense to go for a 32 bit board? This ould enable higher microstepping rates for better print quality, as well as things like wifi support. I am aware that 32bit support with marlin is making progress, but from what I've now had experience with after trying it out, it is still in fairly early stages.