Recline on RF Boulevard for 20+lbs

[GracieMom]

We've decided on the Britax BV, and want dd rf as long as possible.

I have a vague memory of reading something on BB boards about being able to put a rf convertible seat at a more upright position than 45 degrees once the child is over 20lbs. (I like to think this might make her enjoy the carseat more, but maybe just the bigger BV will do it!).

Is it possible to go with a more upright positioning even RF once then are over the 20lb limit, or is it 45degrees whenever RF?

Thanks!

Gracie's Mom