WKO4 is a total redesign of WKO+3. It accomplishes things in different ways. Currently there is no MFRA (multi file range analysis) capability in WKO4 to allow the comparison of multiple workouts at once, but based on popular demand, we have added it to the future feature list. The new system will blend fast-find, interval detection, and MFRA into a dynamic interval review program that should significantly improve analysis. Stay tuned!