Hey PK.
Here is something to try. Next time you go out, take a 30 Gallon hefty trash bag with you keep it in the tramp pocket. If you flip, try and get it as full of water once you are trying to get the boat back over, start picking it up out of the water. I used to be able to right a N5.5Uni at 125lbs with the method.In 5-10knts. It all boils down to coordination i.e. how and when you start trying to lift it out of the water.Water being roughly 10lbs per Gal, typically I never had to lift it very much out of the water to give me the added weight needed to bring the boat over. Once it reached the falling point, I went for the striker to keep the boat from flipping back the other way. I used to tie a loop in my righting line to hook into so I could lean over and pull the trash bag out of the water, not alway the safest, but at least I was still attached to the boat once it came over, and being a uni, it typically went head to wind/irons anyway, so it was not going to sail off with me being towed behind.
Good Luck