For a set of self-adjusting brake assemblies that fit your 2012 Montana Big Sky 3520RL that has 7k axles we have the TruRyde brake kit part # TRU96FR that is correct fit and would work great. Since you have a tandem axle trailer you'd need to order a quantity of two of these. view full answer...
We have RV AC units that were designed to replace Dometic units like what you have with the Advent Air # ACDOM135 which will plug right into the same connections as you have now and will allow you to use your current controls and thermostat. view full answer...