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fets - hard to explain, you buy the fets listed somewhere in this thread, and replace your current fets (found under the board) with two of each new fets.. another way is to do some fancy wireing (neuro explain on page 10-12 which give a super amount of current capacity..
6 cells (7.2V) - you buy a double aaa holder from the shack and wire it between the two batt packs found on the car (its the long black wire).. or you can buy two lipoly batts and get the same results
spinbrush - go to a store that sells toothbrushes, and get the spin brush tooth brush, beak it open and get its motor, pop the end cap off (white thingy with solder points) then pull out the armature (thingy in the center) then replace this with the armature from your S2 motors (you may wish to remove 5-10 windings (wires around the motor) any more than 10 and you wont accel good, then put on the s2 end cap... basicly the spinbrush motor has good magnets, and a good can, everything else should be from your s2 motor
wire upgrade - DONT BUY ONE THEIR A RIP OFF.. just go to the shack and get a spool of thick wire (not to thick) im not sure of the guage so just find a wire size you like.. all you have to do is one by one de solder your stock wires and replace with the wires you got...
happy modding!
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