If you are thinking of hard cased for the Southport races, it's a tough one mate. All the ones I have seen have the corally type connectors on the top. This means that they don't fit in the Tamiya due to the chassis design. I am still looking for a hard cased lipo with front exiting wires but haven't found any yet! Soft case cells are all pretty much the same I am led to believe so if you see a good deal, just go for it. Have a word with Russ and see if he will give you a link to where he got ours from.