Very good question, my gut says you will have to come from above, I vaguely remember my chap had fuel tank supports etc to replace whilst he did it so there must be space, I think the rear CM curves down at the point they replace it.
You are wise to be concerned and query.
Imagine if 2/3 of the weight were at the front on one side it would be on 1 support on the gutter really. But you are also right the feet you have are wider than a lot out there. I would take some...
All good points.....
Keep in mind when you are sleeping only "some" weight is on the roof as the ladder supports a lot of it.
I would in order.
1. Support the rack fully along the gutter
2. Get as light a rack as possible
3. Even the load on...