YOU SAID:

we need to time this perfectly

INTO JAPANESE

これを完璧に計る必要があります

BACK INTO ENGLISH

This needs to be measured perfectly

INTO JAPANESE

これは完全に測定する必要があります

BACK INTO ENGLISH

This should be measured completely

INTO JAPANESE

これは完全に測定する必要があります

BACK INTO ENGLISH

This should be measured completely