I played through all planets one by one without support from other planets, until I found out that Aquilo is "special". Any chance to play this mod without starting a new game?

Currently can't check that, but I think it should load on existing saves without issues, but if you already have landed on the planet you might need to load a few more chunks to find the resource.

Confirmed, it works. But it's not really playable without starting heating tower in your broken ship, if "Any Planet Start" is not used. I guess it's worth mentioning in the description. If I'm not missing something of course.