bluespace crystals
Created by: ghost
They work. Sent something into the HoS' office and heard the crystal shatter. Couldn't send anything in after as expected. Replaced the crystal and was able to receive the HoS' locker, shattering the crystal.
Tried to break it in different ways. Crystals only shatter when messing with a jammed area. You can't stuff more than one in, it gives a proper error message. Crowbars can pry them out.
Only vaguely negative thing I found is that crystals still work without closing the telepad with the screwdriver