Willow immediately knew that this was potentially something which would cut her off from Dawn, the younger girl wasn't going to be happy with her answer and could hold Willow responsible, maybe rightly so.
"It's not going to be a quick thing" she admitted, "I need to do research and I have limited resources. I can't give you a timescale Dawn, it could be weeks or it could be months"
She looked at Giles, "Almost all of it. I mean the underlying spell would be similar but the particulars all need to change. I know I can do it I just need to make sure I work it properly, no loopholes, no curse. I'm already working on it" She wanted to re-soul Angel without the curse but hadn't had the opportunity.