Ryobi is fucking trash.  I wouldn't use a Ryobi flash light.  My first router was a $60 Ryobi the same thing happened to me, the lock broke so it would self adjust any time it wanted to.
If money is seriously an issue.  Buy a Craftsman Router, 2 HP, soft start, variable speed control.... $78 at Sears.  I use it and love it.  I plan on upgrading to a 3 1/2 HP Milwaukee or Porter Cable some day but for now it'll do.
I picked up a pin router $200 second hand
Never snapped a bit yet.  Had one fall out and it just went "ploooop".... scariest experience I had with a router was when I was using a hand held one, I let off the trigger to stop, pulled it out while the bit was still spinning somewhat and it kicked back like a bull, scared the shit outta me.  
Table saw used to scare me, since I watched the Johny Cash movie where his brother gets killed by a table saw.  But my jointer is the tool that frightens me the most.
P.S.  Kick ass guitar, love it by the way, one of my favorite builds.