1. Keep the design simple & use cheap/ scrap  materials. It’s a jig and therefore expendable. I’m not saying trash it after a month, but don’t expect it to last 10 years either. If you need to think twice about screwing down a stop block you spent too much on materials.
2. Make sure The sled is well supported. When you’re making a cut, you need to be focusing on keeping the piece back against the fence, and maintaining a smooth motion, not juggling the outboard end of the sled.
3. Use quarter sawn wood for the runner, as it will expand and contract less (I used White Oak).
4. Put a shallow dado in the base for the runner; this makes assembly a lot easier.
5. The fence needs to be perfectly strait. By perfectly strait, I mean within a few thousands.
6. Build the fence so it’s adjustable, i.e use bolts in over sized holes.  This feature really helps when it comes to keeping the fence strait. If the fence develops a bow, loosen the bolts and use clamps or some other method to push or pull the bow out.

Like I said earlier, squaring the fence can be a real pain. While the five cut method takes the guess work out of the process, no tricks exist to make the process go faster. I think it took me about 90 minutes  to get my sled to within 0.002″ per foot. Your probably thinking 90 minutes isn’t that bad. Remember, wood moves with the changes in weather. After a month or two of hanging on the shop wall your sled is going to need to be re-squared.