Well, I ordered the panel bond. Should be here tomorrow.
In the mean time I did a dry fit, and covered a few of the last spots that needed seam sealer.
The way drainage normally works on these trucks, water drains off the front footwells, onto the rockers, flows under the aluminum door step and then slips sideways into the B-pillar root (next to the seat belt lower anchoring point). This isn't a major flaw, but I'd rather not have water get in there where it can then drain onto those joints in the bottom of the cab corner. There are drain holes down there, but sill, I'd rather keep the the water away from that area.
Now with everything sealed up water moves to the rear of the rocker, where it can drain out the 1" hole. This normally has a rubber body plug so road spray can't get inside, but any water that pools here will gradually weep out.
The last areas where the verticals on each end of the cowling. These areas showed no signs of rusting yet, but it didn't cost me anything but a few minutes.