Starting a new save and I wanted to try Krastorio alongside Space Age, but I can't get your tweak mods to load, both this one and the fork you made of xyrc's Enhancements. They both throw up different errors when restarting to enable the mods.

This is your tweaks:
Failed to load mods: nulls-k2so-tweaks/k2so-tweaks/util/graphics.lua:29: Primary icon does not exist
stack traceback:
[C]: in function 'assert'
nulls-k2so-tweaks/k2so-tweaks/util/graphics.lua:29: in function 'create_dual_icon'
nulls-k2so-tweaks/k2so-tweaks/patches/planets/arig.lua:13: in function 'on_data'
nulls-k2so-tweaks/k2so-tweaks/util/patch.lua:62: in function 'do_data'
nulls-k2so-tweaks/data.lua:12: in main chunk

And this is your fork of xyrc's:
Failed to load mods: xy-k2so-enhancements-nulls-fork/patches/item_weight.lua:10: attempt to index field 'sand' (a nil value)
stack traceback:
xy-k2so-enhancements-nulls-fork/patches/item_weight.lua:10: in main chunk
[C]: in function 'require'
xy-k2so-enhancements-nulls-fork/data-final-fixes.lua:9: in main chunk

p.s. why does factorio not let you copy paste these error logs :'(

Try turning on the Moshine planet mod as well. It solved the problem for me when I turned it on.

Thanks, turning on Moshine fixed it for me too

Fixed in 1.23.1.

Just came back to factorio and downloading and enabling Moshine did fix these errors, but I tried loading without Moshine and it's still the same errors. Whatever you fixed in 1.23.1 didn't do anything for me.