No, I did not... so far, I'm watching to see if I run out of power with my existing NCE 10 amp units. I think I will, though, a single train was pulling 4.7 amps, since it had 6 lighted cars. I'm converting all passenger cars to LEDs to see what I will be drawing. I've got several USAT locos running on the beta version QSI decoders, so hopefully this weekend will consist up something big and see what the amp draw is.
I believe I will have to persue the 15 amp boosters though, otherwise I'm probably close to running out of power on the main with more than 2 trains. Oh, a recently added loop of track has a 5.5% downgrade, and I've been having silly thoughts of trying to go up it!
Regards, Greg