Check wid da guy dat lives in Bellingham, I understan he has a mean sucka to add in line.... Odin nose how to suck..
If memory serves me right, the workmaster electric TM (Sold by Steam Services) also utilized multiple blowers called a hybrid system, It had positive displacement and centrifical vacs hooked up in series. It had a #2 suterbuilt (Like the Bane) and one or two Lamb vac's # 3's I think.