if you decide to upgrade to the trexv2 metal blade grips ...remember to pick up v2 dampners. the stock exi head does not have thrust bearings. any v2 parts will fit perfectly. i got em all.
i did most of the upgrades after a crash of course
. but the stock parts will work beatifully out of the box as stated above. the motor mount will only accept screws 2.5 mm or less through its slots. they can be widen by using a file. [:'(].