Which is a bit sad, but yeah, fair enough - even though I would be like - really? A 'lot' of time? 🤔 sounds like BS to me, maybe it's a couple of hours work for someone who knows what they are doing and is used to these thigns??
Korg make their files available, match that up to the standard Euro layout and define the main cutout?
https://www.korg.com/us/support/download/software/0/832/4570/