I HAVE A PROMAX 400 7.4-8.4 MOTOR , A SIG ESC20 AMP ESC, AND A 11.1V 1900 mah Li-Poly BATTERY. WILL THESE ALL WORK TOGETHER? IF NOT WHICH WOULD BE THE MOST ECONOMICAL TO CHANGE. THIS IS IN A SIG RASCAL ELECTRIC. I STARTED OUT WITH THIS SAME MOTOR AND ESC WITH VARIOUS BATTERIES AND PROPS. THE NICAD's OF 6 & 7 CELL'S DID NOT GET IT OF THE GROUND NO METTER HOW MUCH GRASS OR ASPHALT RUNWAY IT HAD. THE Ni-MH's GOT IT UP BUT RAN OUT OF JUICE BEFORE I GOT MUCH ALITITUDE. SO SOMEONE SUGGESTED THIS AND AFTER THINKING ABOUT THE PAST AND LISTENING TO OTHER'S AND CONSIDERING MY BUDGET I SOLD AN ENGINE AND PURCHASED THIS BATTERY PACK FIGURING I COULD USE IT IN FUTURE FOAMIES IF IT DID NOT WORK OUT IN THE RASCAL. NOW YOU HAVE THE HISTORY. WILL IT WORK,WHAT DO I NEED? THANKS