not sure which buckle the Sang Bleu has but if is the square model as above the new one should be a big improvement. Much depends also on how tight you set it. Frankly I think the best luck would be for big bang unico owners to get the velcro strap 😁 from what I could see that should really have no big metal piece toucing the wrist. Unfortunately the Hublot velcro only works on BB unico as far as I can see.