Hi, Whenever I enter or leave either one of the 3 types of buildings Factorissimo2 adds, it gives me a warning: "WARNING: the Drones mod does not support surface changes due to a Factorio limitation !". Is this warning from your mod or from the Factorissimo2 mod? If it's your's, what does it mean, is it harmfull and how do I disable it?

the warning comes from the drones mod, and will trigger anytime the player changes surfaces (teleports to a different map). factorismo uses surfaces, and the surfaces mod obviously does. As far as I know it isn't harmful, but yeah the message will trigger anytime you go to or from Naavis [main map].
Would suggest a config option to author to "disable drone multi-surface incompatibility console spam" [or something to that effect] so the message won't keep bugging you.

this is of course, unless these two mods are completely incompatible.

also, author requests you to post on the forum link :P