[Porsche-O-Phile]

One more thought on this, and this is coming from someone who's an ardent DIY-er who HATES paying other people to do things (my wife and anyone who knows me well will attest to this...), one possible advantage to go with a contractor-installed type of door versus an off-the-shelf, self-installed type of door is you'll typically get a one-year warranty with contractor performed work (labor & materials). With a DIY, maybe you don't care about the labor (or maybe you do) and you may or may not get a warranty on the materials - if you feel like making a claim, sending in a bunch of forms, dealing with bureaucracy, probably getting the claim rejected, having to fight with them for months to maybe get them to stand behind the product... maybe.

Sometimes it just makes sense. Not saying I'd go that way necessarily but it might make sense for some others.