When to rebuild Gen I calipers??

[RT/ED]

I have a Gen I with original brake calipers. Resivoir and brake lines flushed and new synthetic fluid every 2 years, 35k miles, original brake lines replaced with stainless lines. How long has anyone gone on original calipers without rebuilding/new seals?

 

[vipzilla]

still going !!! but i only have 3600 miles on it