Depending on how full the flights are , you may ( very likely ) be able to bring more .
If you really need all your stuff with you , it can come on later flights which aren't at capacity weight wise . Usually ok on the return leg as the fuel will be less .
Do let them know in advance . They can then schedule their cargo ( as well as returning staff ).
During the ' holidays ' , flights can be at capacity weight wise . Flying in our fresh lobsters , etc