Reply by jmos

I concur with 2; too much chance of movement with one.

I used two incra steel runners on my old sled, they worked well. I recently rebuilt my sled and used oak, they also work well. Toss up I’d say, and the oak is cheaper.

I seen some posts on issues with plastic; it deforms a bit when you tighten down the screws and causes issues with fitting. Not a show stopper, but something to watch for.

William Ng has a nice youtube video on making and adjusting a crosscut sled. Talks about best grain orientation if you’re making wooden runners, along with a lot of other things. Worth a look. http://www.youtube.com/watch?v=UbG-n--LFgQ&feature=g-user-c

-- John