Looking good =D>
An hour with a 3 pound hammer and a block of wood and then about 10 minutes worth of welding and your boat is fixed...if you can tack it back together you can save yourself a lot of headaches and money.
Looking forward to more pics as you go.
Have you tried "water weld" by JB WELD? We have had decent luck with it......scuff the area GOOD with 80 grit till it is nice and clean...wipe it off with white vinegar,let it dry and put the least amount that you need on the rivet,spread it in and mash it down tight.......make sure and kneed it...
Lookin good Lil'Blue....I live up in Southern IL and have an aluminum boat welding and repair shop building bowfishing conversions,decks etc and repairing "oops"..lotta guys are having a lot of custom work done to their jons around our area nowdays...I can probably send you some work if you want it.