I was wondering about the power source of my F3HP. It uses two 1.5v batteries when the MD4 motor drive is not attatched. When the MD4 is attatched, it uses the batteries of the MD4 instead of the two 1.5v. My question is I woner if it is safe to just remove the 1.5v batteries altogether when using the MD4. I read somewhere that it is possible, but I don't know if this can only be done on a temporary basis. Will there be damage to the F3HP if I only use the batteries from the MD4 motordrive from now on?