Sorry takumi, i had a SPY and it blew out in 5 races running my 8 cell pack
The LRP is 1" x 1" x 1" (easy to make a paper cube to mock it up).
Also those Mtroniks are water proof, meaning keeps out crap as well.
I do have another super tiny yet powerful ESC...it is similar to the one on
this page called the Activ Shop Twister Reverse (no brakes

) but it is cheap and handles a 7.2v battery and a 180 size motor. that thing is about 1" long x .25" tall x .5 deep. The wires are huge when you get it...atleast compared to the tiny ESC.