If you are keeping palawanicus, or probably any dorcus for that, be careful. They are VERY strong and aggressive. One time a female I had bit my hand. It hurt so much. I thought only the males were violent, I was wrong. They are also strong enough to open enclosures. I didn't immediately have their permanent enclosures when they arrived, and a female escaped. I found her on the other side of the house. A males also escaped and I found him on my variegated alocasia. I named him Houdini. Bad choice. He escaped his permanent enclosure which was a critter keeper. I found him on the garage floor with half of his mandible missing. On your strong beetle's enclosure I would recommend putting heavy objects like books on top. They are very cool and rewarding but just make sure to be careful.