Not ta burst yer bubble, but my DW, the expert on vacuuming, she has 6 vacuums, don't ask, and uses a standup from the house to vacuum the coach.
She has proved it to me by vacuuming the coach with the installed unit, then using the standup from the house, and WOW, it's amazing how much the OEM misses.
She says the factory installed "Dirt Devil", is "OK" for a backup.
Just a heads up before spending some unnecessary money.