why replace it, I just put two new 1400w three stage motors and a more powerful pump in mine and its now s%*t hot
I replaced the gasket on the collection tank aswell, I also took everything out of the machine including the plate that the motors bolt onto and give it a good clean, then resealed the plate to the machine and also put sealant on the bottom of the motors when I fitted them.
I have also fitted a submersion heater into the clean water tank so that the water is already hot before it gets to the inline heater.
I can`t see the point in replacing a machine completely, after all it is only 2 vacs and a pump replace them you got a new machine