[eng/rtg] changing loopbacks

so i have junipers, ciscos, and a few <gasp> zebras in an ospf and ibgp mesh. they're peering via loopbacks, of course. unfortunately, i need to recover the space from which the loopbacks are taken. of course, i would like to do so with minimal disruption. i am thinking of something like the following: o add second loopbacks to all routers with new address in new block o set up ibgp peerings to new addresses from existing peerings o change the source of routing updates to new addresses o remove old peerings o remove old loopbacks what [else] am i missing? randy