Ahhhh i was wanting you to make something of this nature for your new table saw. When i get mine, This will be one of the sleds i shall make for sure. Thanks for the video, Thoroughly enjoyed watching it :)
The fence needs to be square, but they don't need to be exactly 45 degrees from the blade, since you're cutting a piece on each side of the blade.. So your mitre will be square, even if the joint itself isn't exactly 45 degrees.