Yes, lost over 100kgs doing the swap over, but disappointingly the aluminium wheels weighed more than the heavy duty steel wheels. They are worth it from an ease of use point of view. I should also have lost a few kgs when I got rid of the Claas overdrive swapping to the UG100 transmission, but I don't know how much heavier the UG100 is over the UG3-40.
We have also decided to get rid of some of the things that we don't actually need. I have a 12" subowoofer, 8 speakers and two 4 channel amplifiers, and to be honest, I find that I can't listen to music whist driving the truck, but I can listen to audio books. So I'll remodel the interior, get rid of the subwoofer, the amplifiers and one of the 6x9 pairs of speakers. The subowoofer alone weighs in at 20kg, the amp 7 kg each so there is at least another 35kg of stuff I am hauling around and not using. The other thing is the slatted base we have for the bed, its weighs over 45kg, and the idea was we could raise either end of the bed to level it if we ever parked on a slope, but to be honest we have never used that.
It is also pretty difficult to adjust, as you have to raise it all the way up before it will go back down, and with a 45kg latex mattress, that requires some effort to do whilst standing on the side of the bed,especially with all the bedding on it. We can replace that with 7kg of the Froli bed supports which will do the same job of providing ventilation under the mattress.
There are other thing I can reduce, especially the amount of spares and tools we carry. I don't think I really need four sets of brake pads, considering I've only one had to replace a pair of them because I had the wrong ones in the first place. Similar, I probably don't need to carry 10 litres of engine oil, 5 litres of diff and portal oil. I have two shift cylinders, neither of which fit the new gearbox lol.
I thing I can easily about 250kgs of weight without a problem, and maybe another 100kg through not carrying thing we don't actually need, although we will probably end up carrying more toys.