This was a problem order where I got the parts but one piece was missing.
One call and it was made all right very quickly.
As for the install if you can unscrew a jar lid and put it back on you can do this.
The threads are fine so make sure you get them lined up and only turn it on about 2.5 times.
I would recommend that ZZP would note the older Aeroforce gauges have a crimped on bezel. You can not change them unless you do some modifications. I was lucky as I had a friend who swapped a unused new model for my older crimped one.
Nothing is mentioned on these parts on the web and it should be noted.