Maybe you can counterweight the boys by a 50 kg lady on the hood. This would of course bring up the need of checker plate to bring in the stability (17 kg).I am getting the winch from the Factory because my 40kg Curly Coated Retriever lays against the rear door of the XC90 and he will do the same in the IG. It will be the counter to the winch. I am not sure if it will throw off the handling by 15kg, I will check with Ineos and see if they can adjust the suspension for his weight. This is just a concern for duck hunting, just general traveling my Flat Coated Retriever is 27kg. With both boys in the back (67kg), it will prolly be undriveable. I may have to switch to a Ford Bronco G6 .
Oh, and you should not drive to fast to keep the balance!