You could go a step further with what Usagi said too:

"If you use Zone System only for capturing as much of subject brightness (scene) as possible on the film..."

...then you don't need any system, ZS, BZTS or otherwise. Use the ISO speed for the film, meter carefully and develop normally. Most films will record at least 10 stops with full separations, and have a longer range than that with only minor compression. Then use burning, dodging, VC filters and other print controls to bring all the values into the print. By far the most bang for the buck is in printing skill. Printing is power.