I have a 2017 Four Winds 31W that I purchased used with <3000 miles on it, the Axxera AV615BHM radio was dead. I pulled the dash and replaced the radio with a Pioneer AVH-120BT from a big box store (cost ~$119 along with a Ford wiring adaptor). I used the Axxera mounts for the Pioneer, wired up the connector, attached the parking brake and reverse wires, RCA connector to the video switch box and it works great and sounds good.
I did note one difference/option in wiring, the 31W had a separate connector for the radio's power and +B backup power that goes to the coach power. I opted to use the chassis power, that means the key has to be on to use the chassis radio whereas using the chassis power allows you to have another audio option when camping. I may pull the Pioneer and connect it to coach chassis power to add the option.
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