I weighed DS last night at my moms and he was 31.5, today at DH's dr appt he was 36.5so we stopped at our vet (fancy scale, very accurate) and he was 33.3 lbs. DH and I discussed it and we are good with keeping him RFing until 35 lbs.
How old is your ds? I would honestly recommend against this decision. I see that you're a tech, so I'm sure have weighed the decisions... but you're basing the decision on a spec sheet stating that future seats will be approved to 35lbs without knowing if there's any physical difference in the seats.
Plus between 3 different scales, there's a large variation - I would trust a dr.'s scale over a home scale, and would probably still go with the dr. scale over the vet scale.
Sorry, but to me this doesn't seem like a parental discretion area since it's going over the stated weight limits of the seat & he is possibly over even the 35lb weight limit based on the dr.'s scale. I know most of us don't look forward to turning our kids ff'ing, and sometimes the idea is scary... but at 36lbs the decision really doesn't fall into parental discretion arena - and I have to admit it somewhat bothers me to see a tech say they're making a parental decision so blatantly outside the limits on the current seat.
There's no way to know if the seats have been changed, or if there's a change in installation instructions that accompany it - right now it hasn't happened, and existing seats should not be assumed to be ok to a 35lb limit. :twocents:
Sorry if I sound harsh, but I know that when parents are reading posts, posts from a tech tend to carry more weight. To a parent who reads that a tech is choosing to use a seat beyond the recommended weight it either sends the message that a) we don't think weight limits really matter, or that b) our advice can't be trusted if we ourselves are going against manufacturers directions.
Neither one of these are safe messages to send to parents, and this is why I felt the need to address the comment.