I'm going to apologise in advance, since I don't think this'll be too informative, but I usually have a view of what I'm going to do, ahead of time. That being said, we get to....... Murphy,  (bless his evil little heart ), when the unexpected turns up, I usually say a few choice words bite the bullet and do it the hard way..... rework. Lou.
  P.S.  If someone has an easy way, I'd love to hear about it.

"..... and that was when things got interestiing."