I had a clean break through my tibia and fibula, full leg cast 5 weeks now walking brace 2 mos, how long until 100%?

It depends. Tibial shaft fractures heal slowly, but even after the fracture heals it can take many months for a patient to get back to their baseline activity. Return to full function depends on healing which in turn depends on many factors: how healthy is the patient, smoker?, was the injury high-energy or low?, was it an open fracture?, age of the patient, motivation of the patient, etc.