A busy weekend - grinding. Lots of it.
BTW, when I cut along the coach roof and toe rail, I cut as close to the edges as my circular saw guard would allow. Don't do that. Add maybe a half or an inch or so to that. The thin strip along the edges is difficult to get at with a sander, and impossible to grind at the right angle for a scarf joint. You can still dig the material underneath the edges out and stuff thickened epoxy into the crevices...