Cab corner/rocker gap

[Jaysonb]

When I replaced the rockers on my truck, the triplus rockers seemed to be to short! I did what I could to get them to fit, but I ended up with a pretty big gap between the rockers, and the cab corners. On the drivers side it was worse, so I just welded up the gap, this is a pic of how the passenger side turned out. Not super bad. Will seam sealer be ok in this kind of gap? My plan for the driver side is to just cut a gap with a 1/8 wheel in the grinder, as I don't care for the way it looks welded up smooth. Any input would be great!