I use my router for almost every bit of woodworking that I do. I do have it mounted in a homemade table, which I think adds to the safety of using one. I also use patterns, or templates, whatever you want to call them, and pattern bits, the straight ones, with a bearing on the end. The only real problem I have had is the bearing seize, come off, then the bit bite into my wood AND pattern, making it necessary to make a new pattern. I have found that a couple three drops of Marvel Mystery Oil on the bearing before starting seems to extend the bearing life immensly.
My patterns are two 1/2" plywood pieces laminated, giving a solid piece to hold on to. However, if you are routing a small piece, that's where you can run into real problems. For the small pieces I prefer making the pattern with a handle or something to grasp on larger than the basic pattern to hold it, rather than my fingers. So far that's worked very well. I've got chess piece patterns with basicically a handle on each, and I can route out small chess pieces with no issues at all.
As for use in guitar making. Well, I would have no issues with it. I'm about half way thru a banjo build, and the router is used. But, like I say, I make patterns for my routing. And welcome.
"It ain't what you're told, it's what you know." - Granny Weatherwax
Fawkahwe tribal police SWAT Team
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.