[DaveBlake]

Well I'd prefer to call it a draw as the tags where there but not in the correct form :-)

Rain forecast for the rest of the day here on Skye so maybe a chance to plug and play.

Kodi will read APE tags, even read a mixed file. If you wanted the APE tags for replay gain to take priority of the other ID3 tags, which by absence were saying that replaygain was not set, then you just need to tell it that in advanced settings.

But honestly nice consistent tagging will serve you far better in the long run.
A nice wet "tagging day" down in Cornwall too today, after such a scorcher yesterday.