Hi Jo-anne,
It is you that has control over the nose-weight of your caravan - more careful loading will solve the problem of excessive nose-weight.
For instance, let us suppose that your caravan has an empty nose-weight of 50 kg and you pack in another 50 kg of stuff, then if correctly loaded over the axle you would still have a nose-weight of 50 kg.
But if you stuffed all 50 kg in the front locker, then the nose-weight would approach 100 kg. Similarly, packing it all in the rear of the van would reduce the nose-weight to almost zero.
Put simply, nose-weight has very little to do with the dealer or the manufacturer, but a great deal to do with how you place stuff in the caravan.
Robert