yup lipos fit alright, im not sure about the race boxes lipos but the round edges lipo seems to fit alright. here is my configuration i use the lipo's in the pic.
h t t p://farm3.static.flickr.com/2664/4003388416_0a6ab35b18_b.jpg
h t t p://farm3.static.flickr.com/2541/4003385156_480d3dce94_b.jpg