KES-410ACA / KEM-410ACA / KES-400a which one?

How do I know if this is the right laser? I get this question a lot of time in my tutorial: Change your PS3 optical lens

You could see how the disc goes in the drive. this method offer no guarantees, and may lead to false results

• If the disc goes in straight then its a kes-400a . 
• If the disc spins and you insert it then its the kes-410aca.

Before ordering your new lens, the best is always to open your console! and see it yourself