Above is good advice IMHO join these and search -- lots and lots of input

www.pinterest.com www.lumberjocks.com

www.vintagemachinery.org

here is a good tutoral on building one beefy on the mount and guide bar /latch is good.

http://joe.emenaker.com/Table-Saw%20Fence/Building%20Your%20Own%20T-Square%20Style%20Table-Saw%20Fence.htm