SpaceSimCentral

Which version you are on? The fix for that issue with the Skipjack was merged on the 16th of January. There might have been a save bump since then though, but you could download the modified collision file for it from the PR: [url]https://github.com/pioneerspacesim/pioneer/pull/5087[/url]
Building density depends on the city detail setting and the population of the planet as well.

@arfa That makes sense, the fixed skipjack was merged january 16th.
Today is exactly one year since last release, which means we'll make a new release within the hour (will announce on twitter and on this forum). Stay tuned.