I see nothing that cannot be corrected with proper care. Cannabis is extremely resilient, the longer I am a member of RIU the more examples of that fact I see. You would not believe what some people do to their plants and they still survive and produce. Just remember though it's resilience comes into play as far as the plant surviving damage. The damage may still cause shock, stunting, lack of trichome and THC production, less swelling of the budz and overall yield. It is a law of nature that is unavoidable...for every action there is an equal and opposite reaction. But, learn from the slight mistake and don't do it again. If you are not keeping a journal, you definitely should be.
Anyway, don't sweat the small stuff that cannot be changed...go on with the grow as best as you can.
BTW It is nice to have a buddy offering opinions and possibly advice but when all is said and done this is your grow. Never stop the learning process and you will be able to tell him how things are going to be done...just sayin!