We've done several of these over the last year or so:

Corby 37 Aurora, to increase LOA just enough to increase IRC crew number from 8 to 9.

JPK 1010 Strait Dealer:    to increase LOA enough to increase IRC crew number for the 2016 Commodores Cup. but removed again for 2017.

Corby 36 Oui;  we only specified and helped with this one.  General update to shape during rebuild after sinking.

Ker 40 Signal 8:  as part of a hull shape update.