Anyone ever break a SBJ spindle at the upper BJ taper?

I don't see it as a issue.

I've seen plenty of bent 1/2" taller ball joint shanks when I crewed circle track racing. Many times the tubular A-arm bent or snapped before the pin completely broke. Actually I can recall a broken pin. But plenty of bent and broken UCA and LCA's ! Bent front clips, etc etc.

Are you committed to Small Bolt pattern brakes and/or rims financially or something ?