Question how trivial is this change to the factory is it just a tile change ( like making the floor space scaffolding ) or is it more complex and varied so will need to be tested extensively

some collision_masks basically yes but then i realized Space Exploration also handle some stuff internally (2 versions of buildings, with "-grounded" in the end of the entity name) that i tried to handle (since 0.0.2) in some on_tick mechanic (couldn't find a proper event)
a diff between this and factorissimo2 folders will point out the things, it's mostly copy/pasted and the main risk is to override some Factorissimo2 objects by mistake

here a cool bug for you

The mod Space Factorissimo (0.0.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event space-factorissimo::on_built_entity (ID 6)
Entity is not crafting-machine.
stack traceback:
space-factorissimo/control.lua:1226: in function <space-factorissimo/control.lua:1220>
stack traceback:
[C]: in function 'get_recipe'
space-factorissimo/control.lua:1226: in function <space-factorissimo/control.lua:1220>

dont think it is actually yours as i was pasting a ltn train station and constant combination

Actually its on me, and you pointed me exactly in the right direction by saying "i was pasting something", thank you very much, i'm on it

Should be fixed in 0.0.3, thx again
i may also ask for advice regarding the space factory recipe ingredients/tech tree :)

ummmm well is there more thne one tier or is it only the top tear size ?

only T3 at the moment, i had in mind to even make a bigger one (space machines are big :D)

make it bigger and normal cost plus like 200-500 space tiles