Joe, I don't know about vacuums from personal experience, but in reading the forum, if you don't want to build your own vacuum box system using 4 Lighthouse motors, the manufactured product that uses 4 Lighthouse motors is called the Hurricane, by Blackbox. I think they retail for $2,450. That looks like a lot more than the cost of purchasing 4 of the Fein Turbo 2's (Looks like the Fein 2s are about $350 each new).
If there is some disadvantage to using 4 Fein Turbo 2s compared to using the Hurricane, maybe someone else who knows can comment. Chuck
Chuck Keysor (circa 1956)
PRT Alpha 60" x 144" (circa 2004)
Columbo 5HP spindle
Aspire 9.0, Rhino 5