Watchdog
Have you actually tried using 115VAC 400Hz to drive the power supply for your lap top? You may get nasty surprise.
Yes, it is designed to work on AC power, BUT 400HZ is about 7 times the frequency that the power supply is designed to work with. This frequency difference is likely to have a dramatic effect on the impedance of the transformers that are probably used inside the power supply.
I'm not saying that it won't work, but I'd rather you tried your power supply first to see if it works OK, before I tried mine out.