Short story version:1 hookup on huge model with a breakoff after 1minute. Left mission bay at 6am with full scoop. There was ONE lucky 8 inch mackerel in my scoop of sardines. Headed to 43 under ideal sea conditions, but poor visibility. Saw a few 15ft paddies on the way out, but most appeared dry except one swarming with 8inch yellowtail. Didn't wet a line in any since that wasn't my target. This was strictly a bluefin hunt and didnt want to burn daylight on other possibilities. About 4 miles shy of 43 saw about 5 sheerwaters acting happy, and they were on a small school of the 200lbers crashing the surface and jumping. Clearly these were the largest model BF. I was the lone boat within a mile of this area. They sunk out when I got within 50 yards so I decided the day was young and this would be a bird school hunting day despite low visibility. Continued to 43 high spot and saw lots of bird and dolphin life but no sheerwaters. With the white sky and low light finding anything in the air was almost pointless. Best way to spot any potential was a splash on the water since the sea was almost glassy. Saw few other signs so decided to head back to the spot where I saw them at about 12pm. There were 10 more boats there at noon, but whatever they all were after, they seemed to lose interest and were all gone by 12:30. Maybe they were all just following the crowd. Operating on current first hand knoweledge, I decided to stay and soak 2 lines while chunking. Flylined my 1 lucky mack on a 50lb setup, and let him out about 100 yards before putting it in gear. Put a small lively sardine much closer to the boat and started chunking. Screaming hookup happened 90 minutes later on the mack, and instantly I knew I was undertooled with 50lb. I was getting spooled in his first run, so I buttoned down my drag after 40 seconds. 20 seconds later it was all done. I deserved it, I should have had at least 80 - 100 lb test having seen the size of the jumpers. I justified it by saying there was not much chance of of a hookup on a fly line 80lb in mid day. Since I gave pretty precise details on the location, I waited to post this report till after the Saturday guys have left the dock.... out of respect for the guys who also located these fish Friday. -Sunday all bets are off, and I hope this info helps some guys land large models in the same place! Go back with a kite, chunk and be patient. Good luck to all!