My kids will both be using the same Radian 80. My younger child is 3 years old, 36 lbs and 41 inches. My older child is 7 years old, 63 lbs and 49 inches. This seat will also get occasional use by an 8 year old, 40 lb, 50 inch carpool child.
When both my kids are in the car, the older will be in a low-back booster but when only the older child is in the car, we would like him to use the Radian 80. My inclination is to not install with the SafeStop since it's clearly not safe to use with a 63 lb kid and the 36 lb child is near the weight limit for SafeStop. I wanted to double check that instinct with car seat techs.
We will install it with the straps in the top slots since the taller children need the top slots. The younger child is almost even with the second to top slot now. Thanks for either confirming my instinct or suggesting alternatives.
FWIW, the long-term solution is to have the older child in a Britax Frontier but we won't be able to have that in place before Thanksgiving travel and we already have the low-back booster.
Thanks
When both my kids are in the car, the older will be in a low-back booster but when only the older child is in the car, we would like him to use the Radian 80. My inclination is to not install with the SafeStop since it's clearly not safe to use with a 63 lb kid and the 36 lb child is near the weight limit for SafeStop. I wanted to double check that instinct with car seat techs.
We will install it with the straps in the top slots since the taller children need the top slots. The younger child is almost even with the second to top slot now. Thanks for either confirming my instinct or suggesting alternatives.
FWIW, the long-term solution is to have the older child in a Britax Frontier but we won't be able to have that in place before Thanksgiving travel and we already have the low-back booster.
Thanks
It's one of those things! It is possible that in some situations, a harness might be safer, but in other situations, a booster might be safer. Both are considered safe (when used properly for a child who is old enough). 
