The Centurion 3000 converter in our pop up finally gave up the ghost last fall. No 12v power when connected to shore power, and it had been acting up for years before that. I've seen it mentioned that the WFCO WF8735P is a direct replacement. Has anyone done this replacement themselves, if I order this from Best Converter does it come with diagrams or instructions? Is it difficult to install? The reason I ask is, it's really a rat's nest or wiring. If the new converther comes with a diagram or instructions I should be able to figure it out, if not, I might just take it in to be fixed.