Parts list and sources would be a good idea.
The cart was $65.00, new and I found it on craigslist. It is an off-brand (actually no brand, that I can see) and was sold by a guy with a warehouse full of off-brand crap. Search for "utility cart".
The motor is a GE gearmotor from surpluscenter.com. Here is a link:https://www.surpluscenter.com/item.asp? ... tem=5-1074
The motor mounting "L" brackets are of 1/8" flat bar that I bent and drilled myself.
The Lovejoy spider coupler is aluminum and came from Grainger. The motor side is 1/2" and the mill side is 3/8". Here is a link:http://www.grainger.com/Grainger/wwg/pr ... L1=Lovejoy
The upper fitting for the dust collection system is an 8" round grate from Ace Hardware. Similar to this:http://doitbest.com/Sump+pumps-National ... 429309.dib
The sleeve part of the dust collection system was cut from a 3" Drain-Sleeve found at Home Depot. Here is a link:http://www.carriff.com/Products/drain-sleeve.htm
The lower fitting is part of a "Dryer Dock" quick disconnect, also found at Home Depot:http://www.ventpro.org/
The junction box is non-conductive plastic, 4"X4"X2", found at Home Depot and is similar to this:http://vynckierenclosures.thomasnet.com ... s?&seo=110
The switch came from Ace Hardware, is a DPDT On-Off-On rocker. Similar to this:http://www.wiringproducts.com/contents/en-us/p506.html