I think your reasoning is correct for charging overtime. I haven't heard the "took so long" comment in years. I usually get "that would have taken me SO much longer if I'd done it myself".
I'm thin skinned, so I'd probably take it as an insult if someone asked why it took so long. I wouldn't say it, but I'd be thinking...who are you going to call the next time you need an EC?
Dave
PS I like the 4 hour minimum. I must be in the wrong market. I'm still struggling with the free estimate thing.
