Balancing a heavy lens on a gimbal

I have the sony a7c ii and the samyang 35-150 mm 2-2.8 FE. Im planning to buy a gimbal, and im looking at the Dji rs 3 mini since the Dji rs (not mini) model is 0,5 kg heavier. Im considering this important because i'll be trekking with this setup and this lens is already goddamn heavy so im counting every gram. Do you think it will work fine (full rotation on all axis, reasonable stress on the motors)? Technically the mini should be capable of stabilising up to 2 kg. Or maybe should I buy something more, like a longer mounting plate, i dont know much about gimbals. Im also aware that using the full range of my zoom could be problematic since this lens does extend a fair bit. Thx for help!

sony camera - 514 g

samyang lens - 1224 g, 157.4 mm length

with a filter and an microphone reciever my setup will be around 1800 g