I find it a little weird that the yellow miniloaders are locked behind logistics 2 and cost green science. They don't require red belts to make and it would be nice to be able to start designing your base with loaders in mind before you have to set up green science. I suggest having the basic miniloader research require Logistics 1, Steel Processing, and Fast Inserters to have it match the crafting cost and have it only cost red science packs to research. If you really want it to cost green science then at least don't have it be behind Logistics 2.

Also Fast miniloader research should have a Stack Inserter dependency (In addition to Logistics 2 and regular Miniloader) since they're part of the crafting cost. Express miniloader research would be fine that way too.