Do the new style PD lower units have a different sized gear oil fill hole than the old units? I'm talking about the allen head screw at the bottom of the LU where you fill it up when doing a complete oil change.

I have a screw in adapter and fill tube that I thought worked on my old LU. I didn't have much time to look at it but it seems to be too small for the newer style. Here is a picture of what I have.

Yes its larger, its a 1/4" NPT.