[Users] uac_redirect and branches

Hi, I'm currently playing around with uac_redirect to also handle UAC-triggered call forwards (301/302). My server-side CF-handling works in that way that I rewrite the R-URI in failure-routes and call my normal routes to manipulate the new R-URI and then append_branch() before t_relay(). Now with get_redirects() the new R-URIs are already appended as branches, so how may I manipulate the URIs then? Is there a way to get the R-URI of a branch back into the "normal" R-URI where I can use $rU and $rd and so on? Or how may I handle that then? Setting a branch-route and t_relay() and then manipulate my URI doesn't seem to be the way to go, because there's quite a lot of R-URI processing going on in my config before an INVITE leaves the server. Thanks, Andy