V4 Full Akra Belly Pan OEM Versions

Long time observer with a simple question.

I have a 2019 V4S I use on the street. I purchased the bike with the full under Akra in the factory box but have not installed.
In preparation and ordering the lower fairing kit PN 97180651AA, my dealer said it was superseded to a 2AA which he has in stock and gave me a fairly good price on it. However, when researching further in Omaha, I found out that it has been superseded again to a 3AA and possibly a 4AA.
Being a stickler for the details, versions, and quality I am finding out that in his day and age not everything latest and greatest is as it seems.
I also purchased the conveyor duct to cool the Gear Position Sensor as I still have the original Novotech and not the High Temp one.

Question: Where there any improvements to the later 3AA or possibly 4AA lower fairings for the 2019 V4's that I should consider before purchasing the earlier 2AA?

Thanks in advance.

OK I found the answer. My dealer in Jacksonville, Florida has always come through for me.

They had both the 2AA and 3AA in stock and we opened up both boxes and carefully unwrapped both sets of lowers for the full low Akra.

The 2AA, at the overflow drain at the very front lower edge, had one 1/8" ish hole at the bottom for a vent opening.
The 3AA, had two 1/4" ish holes at the front for the drain. All of the other side openings seemed the same. Ducati must have seen the need for a little more evacuation of fuel.

I was asking this question to see if there were any major design openings to help keep it cool.