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It is not safe to use the harness above the manufactuer's recommendations. You are correct in that what you describe with the way the seat belt fit him is also not safe. Unfortunately there is no add on device that is approved in this situation, that I know of. Unfortunately it sounds as though you are going to need to invest in a new seat. I know that is not the option you wanted to hear, however, it is the safest thing for your son. There are seats on that market that go up to 80 lbs with a 5 pt harness that are the best and safest long term option. The Radian80 and the Britax Regent both go up to 80lbs. Other Britax seats, Marathon, Decathalon and Blvd have a 5 pt harness up to 65lbs. If cost is an issue there is the Alpha Omega Apex65 which has a 5 pt harness up to 65lbs and then is a belt positioning booster after that. Maybe someone else will have another suggestion for your current seat, hopefully. However like I said I feel the safest option would be a new seat at this point. Good Luck

Andrea

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	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.

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