Forum:Clap Traps

Hi, I'm sorry if this questions has been asked a lot.

I think I have found evey clap trap on the list, excluding the ones in the DLC but I only have 36 back pack slots. Is that the correct amount or are there another 6 slots (2xSDU's) that I am missing to get the 42 slot acheivement, not including the ones in the DLC

Thanks