Need help mounting a bracket

[Topflitegraphics]

OK - before I start drilling holes into my nice fresh transom, I want to double check with you guys about how high to mount the bracket.

The bracket I have has a 25" setback and since I bought it used it came with no instructions. After googling it several different ways, I have seen several different heights listed as to where exactly to mount the bracket. Before I start drilling holes I would love to hear some wisdom from those that have done this.

As you can see from the picture, I designed a mounting template. As such, I am pretty sure of where my holes will need to be once I decide on the actual height of the bracket. I currently have the template taped in position at 25" from the keel whcih is one of the heights that I have heard to use. I have measured every corner and she is nice and level but am kind of freaking out about drilling the first hole LOL