I have not seen this mentioned anywhere, so I'm putting it out there for information.
I have a P3P and am in process of replacing the shell. My P3P has the newer style motors. I ordered a shell on amazon and received one of the old style shells with no extra structural webbing. The other thing about this older shell, the tabs where the motors sit DO NOT have the notch in them.
Bottom line, the newer style motors are not compatible with the older style shells that do not have a 'V' notch in where the motors sit. My newer style motors do not mount to this older style case properly.
I have a P3P and am in process of replacing the shell. My P3P has the newer style motors. I ordered a shell on amazon and received one of the old style shells with no extra structural webbing. The other thing about this older shell, the tabs where the motors sit DO NOT have the notch in them.
Bottom line, the newer style motors are not compatible with the older style shells that do not have a 'V' notch in where the motors sit. My newer style motors do not mount to this older style case properly.