The gearbox brace was a feature on the carbed Sport1100. No idea if we've confirmed that it is still fitted to the injected 1100Sport-i (??)
AFIK, no V11 was ever fitted with the mid-frame brace.
[edit: @luhbo, in Germany, reported a very early V11 Sport with the mid-frame brace.]
(For that matter, were they fitted to the Daytona, the Centauro?)