Hi, I'm new here, but was delighted to find some fellow woodworkers willing to share knowledge. I've built guitars very off and on, since 1976. I used a Sears router for many years, which worked great for neck tenons, since it was easy to manage and measure from. The biggest drawback was that it didn't hold the bit well in deep routing situations. So I went and bought a big Makita 3612 plunge router, thinking it was time to get something good. After having it for a year or so, I bought some collars to use for some pickup routing jigs, and when I started it up, the bit was eating the aluminum of the collar. I could then see that it wasn't centered. Has this happened to anyone and can the base be centered? Thank you much.