I personally encourage people to be creative with their tech. The tech boundry is mostly just for setting a specific tone and to keep us from getting too deep into modern or late cold war imagery, but hamming it up within that tone is perfectly fine. I always thought the best parts of PoW was when we went pulpy. Play with some of the milder dieselpunk/atompunk stuff if you want, take national imagery and go to town with it. Have fun.