I've attached a few pics of my shop DC system. I use a 1 hp Seco UFO-90 DC and 4" pvc pipe for an overhead system with three drop-downs to connect to the Carvewright, radial arm saw, planer, drum sander and table saw. Due to limited space I have my Carvewright, planeer and durm sander on rollers -- they are not connected to the vacuum system until I'm ready to use them. The radial arm saw is stationary and is connected to the DC all the time. I have cut-off dampers at each drop-down so I can get full vacuum at each site by cutting the other dampers on and off as necessary. My system has three drop downs with a damper on the end which then are extended using flexible dryer aluminum ducting that is connected to the individual equipment. For static electric control I found 18 guage copper wire at Home Depot and screwed 1/2" self-drive sheet metal screws every six inches on the pvc piping and wound the wire around the pvc and screws, tightened the screws. The wire is grounded onto a wter pipe. At the dampers I used an extra lenght of wire towrap around the alumimum flexible hose and clamp on the piece of equipment as I attached them to a vacuum drop.
I had originally planned to have a downdraft system and had already cut a slot in the table that the Carvewright sat on. I ran across Ringneckblues DC adapter on the forum and after getting it I decided to junk the idea of a downdraft but decided to leave the slot open to see what would happen. The Ringneckblues worked so well that I just left the slot open. I think it probably helps some beacuse of a greater flow of air from the bottom.
I spent an entire year before building the above system trying to keep the Carvewright clear of dust but with no success no matter how hard I tried -- and I did try to keep the CW clean. I spent more time cleaning and repairing than I did in carving. The QC is a natural dust colleter and the inability to keep it completely free from all dust caused z-truck and y-truck bearing failure due to putting extra pressuer on the bit adapter removal tool when trying to get the bit and adapter out of the QC. The Rock and Rigneckblues cleared those problems up and its been clear sailing for the past five months.