Q: Is this a mod of excellent quality?
A: I think so! The original mod was already functional and the stone well is beautiful, but I've taken a lot of time to refine my fork of it and ensure that everything is in order. I have also tried to take into consideration the different things that various players wanted from the mod.
Q: How did you decide what planets the stone well can be built on by default?
A: Pretty much just by checking if the planet has any water on its surface. More technically, I check whether any potentially generated tiles on that planet contains the property fluid = "water". Any planet that I found to fulfill that criterium was manually added to the whitelist in the startup settings.
Q: Will you make any further changes to the mod?
A: I may do a bit of tweaking still. Aside from that, I will just do basic maintenance to make sure that it works as intended.