I have the chill plates on my 305 and they are awesome!!! I do have one small problem however.....on my last trip I went into the cabin to adjust the thermostat b\c the port side box was frozen solid wth all of the drinks in it. So I went in to turn it down, and I don't remember exactly what I pressed but the thermostat went from reading 38 degrees to -38 degrees..........I don't know if I hit a button twice and it switched settings or what? However, something changed and I don't know what.....the plates never quit working, the thermostat just started reading negative numbers when I was trying to adjust the temp.....any word on this out there guys???