Hi!
I've noticed that the loader technologies are missing some prerequisites that are needed for the ingredients (at least for the base game recipes):
- The yellow loader uses steel plates, but doesn't depend on steel-processing.
- The fast loader uses fast inserters, but doesn't depend on fast-inserter.
- The express loader uses bulk inserters, but doesn't depend on bulk-inserter.
It's not a breaking bug of course, you just have to research the missing prerequisites before you can craft the loaders, but progression-wise it would be a bit smoother to add these prerequisites. :)
(I've only noticed this because I'm working on my own overhaul mod right now and was looking at the tech tree to make sure everything has the correct prerequisites, and I want to add compatibility for several mods including yours. ^^)