I like the 12xl. This truck will be HEAVY. 2 reciever packs, one to power the RX, the other to power the esc fans. 2 3s2p packs equels the weigh of 15 NIMH cells (which isn't that bad), RCalloys rear center cvd, gpm tran case (HEAVY), UM Gears (also heavy), reciever and rx battery holders (off a tmaxx), 8spy diffs, ue steel cvds, integ knuckles. The rest is stock, but this thing will be heavy: 13 pound range.