If you just realign the parts without reading our technical lesson or guiding video,
https://youtu.be/pw8Ro2vEEzY
It’s unsafe indeed even you wear laser safety glasses,
However, if you realign them by following our lesson and video step by step,
It’s not so dangerous,
And to make it safer, you can wear a pair of laser safety glasses,
Please note the most important thing is: familiar with the process of lesson and video.