Like many others here, I've purchased the Hitachi M12v router and it's gone on to be the favorite of my 4 routers. Many posters complained about its plunge action tending to stick. When I purchased it, I fiddled with the angle of the handles until the stickiness was *nearly* gone. Well, I have used it for awhile now and its not operating as smoothly as before. While missing the newness of the action, a couple of synapses fired in my brain and reminded me of an old article in FWW regarding router tuneups. After digging through the many shelf-feet (sf?) of issues and getting sidetracked untold times, I found the article and applied its recommended procedures to my M12v. WOW. Silky smooth action has returned. Actually, that's not quite right, it's better now than it was out of the box. As a matter of fact, it worked so well, I got my old Craftsman plunge out of mothballs and tuned it up as well. Again, works better than new (still has the ARHA feature, though).
For those interested, it's issue 152, December 2001.
Just had to share.
Joe C.