Level on sloped campsites. How? Unique to 5er's

For the record Dutch they do have a smaller size jack stand that could possibly work. It's a little cheaper, smaller and lighter which would make it easier to transport
I preferred the larger 12 ton model because they are more stable and can carry the load of your 5'er effortlessly. The added stability trumped all other factors for me. The 12 ton model is a bit heavier but not too bad. The extra weight translates into stability.
Hope they resolve your issue