The bench is held up by 2 pieces of 3/4 mdf, they slide out of pockets in the lower unit.
The reason the miter bench is so long, is that is just what I had room for. I use it more for the storage below than cutting on the top. I can however get repeatable cuts out to 8 foot, so if I build a tall cabinet, I can cut the face frame. I have a stand and another miter saw. I don't use it that often. It will cut a 2x12, where the one on the bench will only do a 2x6.
Yep, that is the total collection. I need to go count it later. There is one in that area that is getting ready to be shipped somewhere.