I am a engineer so I would like to see this model made better than the flimsy rubbish that is produced by Thetford that ends up in land fill due to the scaled down plastic workings that are not capable of handling the falsification up of hard scale water and urine deposits which end up making the unit inoperable. Come on we are getting fed up with the quick fix rubbish that cannot be effectively be cleaned by a stupid narrow opening and limited part replacement. If you are happy with the way Thetford produces this product then good for you but I want longevity reliability and a better bang for my money than the flimsy stuff that is produced these days.