Quick and simple question. I have a router, and a template routing kit for it. I made a template for the accenting at the bottom of my marquee, shown below:

I'm planning on creating multiple 3/4" x 3/4" x 1/4" depth 'squares' (accented, as I realize the bit will give me rounded corners, and like that) at various intervals all over the cabinet (to denote the 'connector' attachments, that appear in the original plan - check my thread or blog for more info) and need to think about the best way of doing them.
The first way would be to draw the squares where they need to be placed, and manually route them out. It sounds easy enough, but I'm obviously concerned with making any small, stupid mistakes. (Like, accidentally sneezing and drawing the router across the entire face... The second way would be to making a simple template, attaching it in place (in my experience lately, my clamps are NOT the best, so screwing it directly to the stock and repairing the holes later is an option) and then carving using the template.
Which way would you experts recommend? I have about sixteen to do, and do want a uniform (i.e. "perfect") look. (Did I just answer my own question? Is the template a must?)
Thanks!