Plastic surgery to get the look alike to look perfect takes time and then you see somethink that needs touchup. So then the saying for plastic surgeon is remembered, if you tweek take a week. o obviously they knew the mask would only show the upper cheek and up on the face so they've been working on the base area of nose, mouth and jawline and if they needed to cut bone that might take much longer. So they're trying to do it the right way. Hell if law enforcement went in and arrest the lookalike then Biden could claim he never went into the whitehouse ever or some other stuff to get off by not letting people see below the mask. Though they could take or have taken DNA when they thought it was Biden for evidence later so then the never done this or that falls flat. Or taken an item when he was on camera touching it then they'd have video evidence from the news like CNN or another 3 letter network.