I have had the #42690 micro-adjust edge guide for my 690 router(s) for quite some now and frankly, it doesn't get all that much use. However, the $48 it set me back those few years ago was suddenly self-justified today when I had a long highly-precise multi-level slot to route out.
I was making the long 1/4" wide slot through a sheet of 3/4 finished particle board -- the through-slot needed a 1/4" deep shoulder on each side.
(Envision a 1/4" deep by 7/16"-wide slot with a 1/4" wide slot 3/4" deep sliced dead down the center for an overall length of 28".)
Without the micro-adjust guide, I could not have pulled it off.
Your smileage might well vary :-) |