It is the accessory parts that do it gearbox is automatic and load heavier, awning is 32 kilos oven 26 kilos toolbar 62kg tv and dis12 kg it all adds up, the micro quoted is the basic van with no extras at all, I can’t even fill the fuel tank or carry water without needing the 3860 so that is whyI went to4200max weight. I went through the Homer price list to get the figures, I bought it as it was on the showroom floor as a demonstrator with loads of bits on it.When I bought my MLi 580 with a similar spec to GWAYGWAY the dealer said Hymer would downplate it to 3500kg in the future, even though it would leave a very small payload. It has a MIRO of 3281kg. I don’t plan on doing this but it did not seem to involve any weighing, just Hymer working from their records.