Instead of replacing it, try modifying the public values of the already existing one.
If you need to check if the target has changed you can store a reference to the current target and compare it to the one in MouseOrbit in LateUpdate
At launch means before mods are loaded? Just in case, could you try unsubscribing from all mods just in case? (I'd advise keeping a list of which ones you were subscribed to so you can easily resubscribe)
I don't notice anything strange except the error after 'Caspercaper17\'s model pack', but that might be nothing. You can try to unsubscribe from all your mods and see if that fixes anything. Before that you might want to make sure all your drivers are up to date.
Right-click + drag should work, I guess there might be some issues with how it tries to detect the right-click on a macbook?
I tried googling it, but couldn't find any solutions other than somebody suggesting to use a computer mouse.
You can try this...
I've had similar problems ion windows with unity games, sometimes it's fixed by putting it in windowed mode, then dragging it to the correct screen and closing it normally.
For windows there's -adapter, but unity doesn't support that for linux. You could try messing around with some of the...
did you make sure to do "1000", and not "1k"? And you should be able to change it in the savefile.
Though it might have a max amount spawned in per block, in which case you'd have to spawn more and extend whereever it reads them from. You can try asking the author if it's open source.
make sure the red part of the sphere doesn't intersect with the green part of the block you want to make "immune". You can also try messing with the block-order and see if that changes how they connect.