I pretty much built this over the weekend....well a long weekend. Found the 1/2hp 3 phase motor on the bay, new in box. The 9" disc came from Beaumont Metal works. The disc is a very nicely made piece and runs incredibly balanced. Controlled via a VFD which gives me the ability to run forward, reverse and have digital speed control. I couldn't find everything I needed in a commercially available unit. I use a disc sander for grinding the radius ends on my metal plane bodies among other things, so the special jigging I built into this machine accommodates those needs. These pictures were taken before I added the vfd and required mounting brakets.

Dust collection chamber is integrated into the base. The chambers begins just in front of the disc and is just a little wider than the disc at that point and then tapers to the size of the vac fitting toward the rear of the machine. Collects very efficiently.

Ron