Question about harvesting!!!

I was wondering what peoples opinions were on taking the top buds off the plant that are ready to be dried and cured... and leaving the rest of the plant under the light to keep growing. Will the smaller buds that are not quite done continue to flower or will it shock the plant too much?

Common practice.

I have been flushing them with nothing but water. Should I start giving them nutes again or just only water?

Like Bak said thats commonly done , now flushing or not is preference....