I did the same thing on my txt-1, put basically craft foam on the bottom and sides, stops the lipo getting damaged if it rattles about abit or shifts forward/back.
Where can I buy those craft foam?
My Sponsors
Hobbywing
ManiaRc
Acorn racing
UpgradeRc
Blackbeard RC
Team Hong Nor
Team RC Monster
MoosRacing
BocaBearings
SweepRacing
Tresrey USA