If you want Legacy available on both lines, you just connect the outer rails together for the 2 loops. This allows them to retain the ability to have different voltages on the center rail, but the outer rail common connection lets Legacy or TMCC exist on each when desired.
Normally you need to be concerned with making sure the transformers are both in phase with one another when doing this, but the 135 Watt Bricks likely are built the same. (there were issues with some 180 Watt bricks many years ago where some were made out of phase with respect to others).
As to your power strip question, you may have an issue with it, but there are also some conditions that cause some power strips to not work properly with Legacy or TMCC bases.
You could try another one or 2, but you may have to plug the base into the wall.
-Dave
