Transmission fluid change via multiple drain and fills?

[02FailBlazer]

Want to replace my transmission fluid, looking for an optimal method. If I bought a transmission pan with a drain plug, could I just do the following -

1. Drop pan, replace filter, bolt on new pan with drain plug
2. Top up fluid, idle engine in gear for a few minutes to circulate fluid, drain via drain plug
3. Repeat step 2 until fluid is clear and of appropriate color
4. Allow transmission to fully cool, top up to cold fill line

Is this fine to do? I'm aware of the cooler line method but it makes me a little nervous. Guess I could always stop earlier than necessary and top up, then repeat until the fluid is clear and red?

 

[movietvet]

You can do it either way, that makes you feel good about it. How many total miles and miles since last filter/fluid change?

 

[Mooseman]

That way or a little quicker this way:

or