This is a great project from Woodsmith Shop Plans which are free by the way. It's very straight forward and can be built from common construction grade lumber. Its made from 1/2" plywood, Douglas Fir 2" X 4" X 8' & 2" x 6" x 8" lumber, T TRACK, 2" X 2" X 1/" X 6' aluminium angle and hardware.
I used cabinet grade maple plywood for the support bases for the fence and the saw and I used poplar for the fence faces and the center guide. The base uses I beam construction with a guide strip that the supports are keyed to and allows you to slide the supports and saw to varying positions depending what your cutting. The fence is made from Poplar and aluminum angle that makes up 2 3' fences. It is very accurate since the supports are keyed to the center guide and the fence is keyed into the support clocks. When not in use you can build a wall mounted rack or you can remove the saw and stow the fence and store it on a french cleat.
I've had the miter saw for many years I just couldn't justify the expense of the factory made saw platforms and I've seen several shop made platforms that just didn't ring my bell for one reason or other until I saw the episode from Woodsmith shop when they built this station.
My wife and I are getting ready to build a shed and I want a quality built shed plus I'm tired of using the old standby folding table so I convinced the wife I needed a miter saw station. I still have a few items left and as I head to the finish line I will post better pics of the stations features, or you can go to www.woodsmithshop.com and see the plans that you can download for free. A truly great site. Thanks for viewing!
P.S. The last pic is of our 1 year old 150 lb Saint. She hangs out with me in the garage when shes not terrorizing the 2 shihzu's or shes lounging up in the master bed. Shes a real sweet heart but hard headed but shes finally responding to training.