If you want to load more SV10 in 20ft container, I suggest you make the length into 2.9m, because the container inside length is 5.85m, if you make 3m, we only can put one stack of boat, the space waste too much. If you make 2.9m, then we can load 2 stacks in container. Please check the loading details in attachment.
3m SV10 can be put 5pcs in 20ft, but 2.9m SV10 can be put 10pcs in 20ft.