I've been harvesting castings from my CFT for about 3 weeks, storing the sifted castings in a plastic box. When I did my usual harvest yesterday I noticed one or two eggs in the sieve. When I've had a look in my stored castings, there are dozens and dozens of eggs. The fact is, they've been breeding right through our winter, and it's been pretty cold. For the time being I'll just return the eggs to the box but I'll definitely been setting up egg boxes this week. Happy days for this worm man.