Agreeing with the above. I would wait until the first one pips, and then cut if I felt the need to. I've seen too many horror stories of people getting impatient to cut and realizing after cutting that their clutch was not as developed as previously thought due to incubation issues (possible temperature drops without being aware of it, etc).

What's the problem with waiting a few extra days? Sure it's exciting, but the wait won't kill you. Like if you know you're getting presents from someone for your Birthday. You don't ask if you can 'just take a peek because you just can't wait'. No, you wait until the day. The present is still the same either way. It's just you who is affected by the time.