I finally got around to assembling my new router/planer jig. The plan was floating around in my head for awhile and I began buying the parts I needed a couple of months ago. My old jig, which was a pretty simple design, actually nothing more than a couple of aluminum straight-edges fastened to a base with a sliding carrier to hold the router, worked OK, but it wasn't all that accurate since it relied more or less on gravity to hold all of the components together. So one of my aims with this version was to couple all of the parts solidly together so there wouldn't be any un-wanted motion in either the horizontal axis, or more importantly, the vertical axis. I figured if I could limit all undesired vertical motion it would go a long ways towards helping me to get the flat and smooth finished surfaces that I was looking for. In my hunt for suitable components I ended up buy some of the surprisingly inexpensive linear rails and carrier bearings sold on ebay. Even though the rails and carriers were relatively cheap (about $50 bucks for a pair of rails and 4 carrier bearing blocks) the quality is pretty darn good. The rails are hardened and tempered 1045 steel and hard-chrome plated and the bearing carrier blocks are solid and smooth running. The bottom or "X" rails are 20mm diameter and supported by aluminum extrusions - very stiff. The top or "Y" rails are 16mm and very stiff as well. I fabricated the plate that carries the router out of some 3/16" aluminum plate I had kicking around. The base is just a piece of 3/4" MDF with T-nuts inserted to bolt the rails down. The only thing to note about the base is the current crazy price of of a sheet of 3/4" x 4 x 8 MDF - it's now up to $30 bucks a sheet; a year ago I was paying $20 bucks for the exact same stuff - a 50% increase over the last 12 months. The Wen router is kind of an odd choice for me. Most of my tools are good quality older U.S.A. made items. I was going to put my old Porter-Cable Speed-Matic production router on the jig, but then I started thinking it might be handy to use a dedicated router that I could just keep bolted on and in place without messing around and pulling it off and putting it back on. I found the Wen router on the local CraigsList. It was brand new and the guy wanted $50 bucks for it. I tested it out at his place and the motor ran super-smooth, so it was a deal. I'm actually pretty impressed with the router - 15 amp, soft start, variable speed, and very little shaft runout. It really runs smooth and has more than enough power to spin the 2" diameter planing router bit that I'm running with it. To test out the jig I trued-up a couple of one piece air dried blanks I've had drying for about 3 years. Even though the ends were sealed and the blanks were stickered and rotated every couple of months, they still ended up with some cupping and twisting. One is Noble Fir and the other is Western Red Alder, so they aren't very tough to rout flat, but I think they'll work pretty good for guitar bodies . It planes dead-flat with no perceptible bit tracks which I think is pretty good for 2" wide pass. If the jig looks a little weird - like it's off-center or something, that's because it is . It's winter time so most of my work takes place indoors and I'm running out of room to set up my equipment, especially this rig which is 40" wide X 48" long. That's why I have the right "X" rail mounted towards the center of the jig instead of all the way to the right of the base where I already have a line of T-nuts installed ready to receive the right "X" rail in order to take advantage of the full working width of the jig. .