Since I haven't seen too much discussion about actually carrying a kayak on the roof rack, I thought I'd share a picture of me doing so... I have a Wilderness Systems Pamlico 100 kayak (10 foot, 42 lbs) on a Whispbar, without any saddles or other rack attachments. I used one long strap that looped over the top of the kayak twice, and two other straps on the front and rear of the kayak. Getting rack saddles, such as the Yakima Evenkeel, might still be worth looking into since there is a little of left-to-right sliding possibility if you take a turn quickly. There doesn't seem to be any good anchor points on the front and rear of the Model S so I just fed the straps through the hole in the rectangular latches and carefully shut the trunk/frunk on them. Some microfiber cloths were used to minimize areas of direct contact with the paint. I'd be interested in hearing if anyone could suggest better front/rear attachment points. Energy consumption on my 70D isn't any higher than my overall average (was actually a little lower), but I attribute that to me driving a little slower and less aggressively while carrying the kayak.