I also prefer the 'tripod' style, but use 3/4" plywood rather than 2"X4"s to save a little weight. Plywood is also much less likely to warp, twist, etc. In addition, I would suggest mounting either transfer ball bearings or a conveyor roller (I prefer the ball bearings) to the top rail. That way, you're never fighting wood-against-wood friction on your outfeed. Hope this helps!