I've had a picture of the installed Mantis Merlin protector screw locations posted here for a few days now after someone asked me to. I hope that helped somebody, it can be done as I've shown. It does work well if you do it right. Someone is still asking about the Mantis moat eject protector and I have a picture of that installed as well. Good job documenting this stuff.

Those switch protectors are installed on the in-lanes not the out-lanes, although someone could get an extra two for the out-lanes as well, but you are showing the in-lane install/

I have mentioned all of these points once already. The Mantis Moat Jump protects the front vertical wall of the castle hole from ball kickbacks I think. I put the Mantis on BEFORE the Cliffy if I remember right from 2.5 years ago. The front topside edge of the castle hole is still unprotected as the Mantis cobblestone is not wide enough, you will get wear on that edge even with all these protectors installed.

You might want to consult someone who has done this more recently, I am going by distant memory and could be wrong about what the Mantis is protecting over the Cliffy. I cannot see it well with just a topside flashlight but maybe there is redundancy there, I forget. It does look like a redundancy in your pictures. If so, I'd choose the Cliffy only since it has the moat plastic protection.