Does it hit the WB everytime? My Novatron is 10 years old and still kicken. If you're interested, I found a guy in TX that will repair any Novatron equipment, he was actually an engineer for them and knows what to do. He'll actually replace your flash heads for a decent price. The only issue I ran across is the power pack I have is a 5 prong plug and the new lights reuire a 6 prong plug. I found an adapter to go from 5 pin to 6.
Use the Flash WB preset. I still use some novatron flashes from 2003 and they've been quite reliable.
I use the m500 Monolights. Its just a normal plug.