This Resilient Manual seems like a perfect companion to Flexible Steel. Be cool if there was a new bundle project with Pavel Macek and Jon Engum.
They complement each other - Flexible Steel and its various drills are mentioned in the manual quite often. Both are based on Pavel's teaching. As for bundle project, Flexible Steel is 1 day event, Resilient 1,5 day - I am not sure if folks would come for 2,5 (=3) days.