Hello. I have limited knowlege of electronics, I worked for the telephone company for 37 years but mostly used the waterpipe system to follow circuits. I am hoping to build a motor control for a model boat. The motor will draw 20 to 30 amps. I was hoping to use the control board from a servo and basically remove the existing motor and run the new motor through an H-bridge from the old motor leads. How does the basic idea sound? If ok, what model number Mosfets would work. I saw some 125 amp 24volt Mosfets on E-Bay - would they work or is there overkill in electronics? I will probably be using between 7.2 and 12 volts. An additional question. How do you tell from a Mosfet spec sheet what the operate voltage is? I am concerned that I won't have enough voltage from the servo to operate the Mosfets. Any additional ideas or insights would be very appreciated.