Thank you for the support!
Thank you all for the input!
I didn't know there was a place for me to show my tools, I will set that up, thanks for the tip.
I am not exactly sure what a lot of these terms are but I now have a starting point to look up the terms, thank you for the heads up.
I did consider using a circle cutter to make the outline and then route the inside, or as you suggested to make a MDF template, the big problem I found with this was that the size of the base isn't an exact 4 inch cut out.