Thanks Brady for the info. Here is what I needed to do to adjust my F2 jack.
Using a 9/16" socket, I removed the 4 mounting bolts and washers from the trailer/F2.
You can see here the 3/4" nut on the backside of the jack. This nut along with the 7mm allen head bolt need to be loosened to make any height adjustments to the F2.
I made sure to mark my original height.
Then I marked 3" from that mark for the new setting.
I tightened the 3/4" nut and then the 7mm allen head. From there, I bolted up the 4 9/16" washer/bolt combination back to the trailer.