The vinyl eaves (soffits) (click images for a larger version)
Here's a shot of the vinyl on the narrow eave. Vinyl on the eaves should help keep wasps and bird nests off the cabin. The dark strips at the top are duct tape. Next trip up I'll secure the top pieces with white headed rivets.
This shot shows the detail at the corner. The border is "F-channel", nailed to the framing. The panels are then cut and slipped into place.
We used perforated panels on the longs eaves. The roof is setup to allow venting all the way up the inner surface, but we haven't opened up the blocking in the ceiling to allow that. If we ever do want make the ceiling vented, these perforated panels will be needed.