I had to replace our dying Magnadie "RVRadio" recently in our 05 Adventurer. I had no problems with the wiring since the Magnadyne harness used standard wiring colors that matched my replacement radio. I had to splice, solder, and shrink wrap each wire individually since the Winne and Magnadyne connectors were non standard.
The real problem I had was with the size. Tha RVRadio was a DIN 1.5. I couldn't find anything in a DIN 1.5 that was "worthy", so I opted for a Blaupundt DIN 1 receiver with a Blaupundt DIN 1 CD changer below it. Cutting out the dash to a DIN 2 size was trivial, but ran into major problems with the metal behind. There wasn't enough depth for the changer and this required some "modifications". I'm not sure I would have gone this route if I'd known how much modifications would be required.
But now I have more room in my over dash cabinet after removing the CD changer I no longer need, and my wife can load the in dash changer while we are on the highway, so this is a big improvement. Also now we can use MP3 CD's and flash drives, and have hands free phone courtesy of the bluetooth interface.
Steve, Gail and "Shadow" (Black Cocker Spaniel)
2005 Winnebago Adventurer 38J
06 Subaru Forester toad; 67 MGB - Alternate toad