I see, that indeed fixes my problem. Thanks for the quick response!

While designing a blueprint in editor mode, I placed some rail ramps in places that should not have allowed this placement. When I created a blueprint and tried to build it in my non-editor save, the rail ramps were not buildable. I've noticed that there is a difference between placing the ramps ...

I have the same issue. I have mining prod 4000+ and even with speed modules and beacons the drills are not able to saturate the belts. When hovering over the tooltip of a miner it shows that it produces thousands per second.