Glad you got him - crittertrails are notoriously easy to get out of I'm afraid as are any small modular cages.
He is really much to big for those types of cages so is trying to escape because he is so very bored and his wheel is likely much too small.
Might I suggest you go now and buy the biggest plastic storage box you can find. Cut out most of the lid and then mesh it over. There are instructions here and I would only do the lid with him.
Bin Cages Made Easy! - Hamster Central WIKI
How to make a custom bin cage! - Hamster Central WIKI
There are other threads around the forum. Now go and get a nice big wheel too on a stand or a 12in flying saucer so he can run to his hearts content. Fit the bin out with lots of toys both home made and bought and lots of cardboard to chew.
I'm sure he would be much happier
You could even use bits of the crittertrail in the bin like the tubes etc if they are not too small for him
I hope that helps.
For now place his cage in the bath so if he escapes he will be contained in there. Dont have a chain from the plug though in case he scales it!