I have them mounted now, but I intend to change out this piece of Melamine so I did to a lot of extra there except add a couple of blocks of wood to be me a longer screw and more thread to hold. It has two support arms that go up under the extension table and mount there. So I added a 2" angle iron under the end of my extension table to bolt the unit to and add some support to spread the weight around. Well I didn't give a lot of thought to bracing until it got here and we started to remove it from the box. I have the 52" fence on the UniSaw so that means it has be way over there. When you are looking at collecting the dust from the top of the table all kind of things get in the way so where do you put this thing. Since I was at a point I couldn't make anything and I wanted it to be ready when I could I decided to purchase one. I thought about making one and one of our members did so and it looked great. The blade guard was long gone from this saw when I purchased it so there was nothing on top. I have dust collection coming off the bottom of the UniSaw and even with a ZCI I still got dust up in my face. I would be covered in dust and the floor in front of the saw was covered in dust and even things behind me were covered in dust. But when making cutting board I was making a lot of dust from the top of the table saw blade. I already had tools connected to the dust collector with PVC drain pipe as my transport pipe. While I was unable to do an woodworking I purchased some things to make some changes on the dust collection in my shop. I have seven more therapy sessions to try to build my strength in the arm and they have told me it will take me a year to be to the point I don't think about it. Not completely healed and still got a long way to go, but I am getting there. Let me tell you it was great to be able to do something again. Last night was the first time I have pushed a board through my table saw since it happened. Today, July 30th, It has been almost exactly four months since I tore my Rotator Cuff and it has been three months today since the surgery.