Recently bought a 17' ski boat + single axle trailer. The trailer only has 1 chain on it-- do i legally need two? (I live in california)<br /><br />Regardless of the legalities, it seems two would be best-- how would I go about adding an exra chain for safety?<br /><br />The options I see:<br />- drill into the trailer (its painted and will rust!)?<br />- Add a chain to the existing chain using a lock type mechanism (will it provide enough support weightwise?)<br />- Your suggestions?