EC3 supports four kinds of specs on material properties: min, max, target, and exact. In most cases the default is what you want (target strength, max water/cement) but by clicking on the search type icon (≤,≥,=,≅)you can choose a different spec.
This week, we have released new privacy features for building projects. Clicking the Public/Private button will let you set whether other people can see your project; if the button says 'private' then only you can see the building project. Group sharing, campus/complex privacy features, and more are coming soon! As always, feedback and bug reports are most welcome.