So, playing with yuoki and Hero Turrets for a while, it's come to my attention that the Yuoki Turrets lose their tech bonuses when ranking up via Hero Turrets, as well as not getting the same stacking damage bonus that other turrets get when being promoted.

For reference, the one I'm specifically referencing is the T-gun Bruteman and Maudlin from: https://mods.factorio.com/mod/Yuoki

Hey Auron!

If I had to guess it’s because those tech upgrades are looking for those specific turret types.

For instance the rank 2 turret is actually an entirely different entity with a different id tag. I’ll see if I can check for tech upgrades that are applicable, but if in the mod they are looking for exact names there won’t be much I can do.

All that to say.. I’ll check it out! Thank you for letting me know

That's the interestign thing, this is SPECIFICALLY for Yuoki's turrets. Bob's Mk2-5 turrets have proper damage scaling with ranks and retain their bonuses, so it doesn't seem to be quite as simple as the name. I'm not great at diagnosing unfamiliar code though, or I'd try to help more. Apologies.

And as said, other turrets seem to get a damage bonus for ranking up. Yuoki's bruteman and maudlin lack that feature (as in a rank 2 having 20% more damage, etc.) on top of their damage going from 25% x2.3 to flat (and weaker) 125% when becoming a 'ranked' turret.

Fixed, you will see it in the next update