There is enough space for all 7 civs (yes, including Vulcans and Andorians!), the Borg, and all associated systems and exploration cards. Remix of talker13's insert https://www.thingiverse.com/thing:2811010 with some modifications and some new components. Dice tower is a remix of MementoMori's https://www.thingiverse.com/thing:2796316 . The civ trays now have specific slots for command, ascendancy, and warp tokens, and they have nesting tabs that make them easier to stack (but tabs are fragile fyi). The dice tower is difficult to print but ends up working nicely. There may not be room for the starbase models anywhere unless you get rid of the dice tower or use the Borg box. Also, this was not designed for sleeves, sorry - I probably won't redesign it for sleeves unless someone makes it worth my while haha.
Here's everything you need to print for the complete insert: - 7x civ trays - 3x resource box fill (recommend printing on the side as shown in the STL file view - this makes the curve smooth and avoids damaging your tokens. You then have to press these hard into the resource box. ALSO, if you have all 7 factions you won't want these in the production & research sections - not enough space to fit all the tokens! Still nice for the culture tokens though) - 2x warp lane tray - 1x everything else
If you'd like to work with me on designing inserts for other board games, let me know!! If you found this useful, please consider donating to paypal.me/playfutbol2. Help cover the time of design.