FYI, for some reason my core continues to collect resources even after reaching capacity. This is on beta 112.1.
Ick. I want my side storage to fill up once the core is full and to stop using resources making the higher tier items. Oddly enough it looks like it actually sends the materials into your global supply, I noticed.
Once I hit 4000 I noticed the global supply continued to rise. There should be options to control what the core does when it's full.