My point was I don't know shit about StEaMwAys - other than you gotta be a grease monkey to run one.
BUT
I do know portys , and I'll bet a whole lot better than you. I've done 1 - 3 stage,2 - 2 stage, 3 -2 stage, 3- 3 stage, 4 - 2 stage, 3 - 3 stage and a 2 stage, in series, parallel, series and parallel.Lid boosters and in line boosters.General, Hypro, pumptec and the new Cat debuts tomorrow. 1500 watt, 2000 watt, 3250 watt electric heaters, sometimes with a bucket heater. If it can be done electrically Larry, I've been there. I'm not bragging, just relating my experience running electrically powered equipment. Been there, done that. Yes, you can get a Cobb set up like the link and it'll work like a bassturd, but it requires a little refining. I'm more than sure Mytee John's set up is good, but I like to have a little more pressure than 200 PSI. I was assuming the man wanted more vac for longer runs- those are rock solid solutions that'll work like a charm..
Now stop gettin' all butthurt.(or I'll expose your fishing frauds) There's a lotta options when it comes to boosting vac with electricity.