6 1 can bind green level signatures. After signing the contract, if it is synthesized, the equipment in the middle of the moonlight treasure box will be the main one. If there is a signature in the middle, there will be a star when there is a star. If you put the blue and yellow equipment with stars in the middle, there will be no stars after the combination.

Finally, unsigned equipment needs two 6= materials to be added, and signed equipment only needs two 4= materials to be signed, so I suggest you buy equipment that needs to be signed.