So here's how the modifications work with a solo carry...
With the pad in place it's fairly easy to hoist the canoe up on my shoulder and grab a thwart or the gunnel:
View attachment 147429
Here you can see how I cut the thicker section of the pad so it fits up against the hull in the tumblehome and the strip I cut from the thinner section is added to fill in the original gap. The pad isn't snug but it doesn't move around all that much as you set it up on your shoulder and once there it stays in place under pressure. You get a feel for where to place the pad along the gunnel but just in front of the seat seems to work consistently:
View attachment 147430
(If you try a steep carry it doesn't work as well because the canoe and the pad try to slip off your shoulder.)
So here's how I typically rest the canoe in the palm of my hand. You can lock your elbow and it's fairly comfortable to carry:
View attachment 147431
If there's a bit of breeze I just raise my arm and keep the canoe from tipping into or with the wind. You can adjust the angle of the canoe on your shoulder to compensate. I also tend to grab the thwart for added leverage.:
View attachment 147432