Why do a lot of your projects use a modified servo?
I have seen a couple of projects that use a modified servo which appears to remove the circuit board and simply hook up the power supply to the DC motor. The only components that seem to be left in the servo are the DC motor, a few gears and the servo box. Why then couldn't I just use a DC motor, they tend to be far less expensive than the servo (~$1 for a DC motor compared to >$3 in bulk and up to $12 if you are not buying in bulk)? In other words could I use a DC motor and get similar results?