Let us know how you get on with the peg thing. I'm sure there's a magic method nobody has figured out yet!
Peg and dowel is super easy - honestly. Sorry if people know some/all of this already, but if I go through it from start to finish, it might
help somebody else.
To get it out, wind the window down until you can see it through the inspection hole under the window motor. Screw a fairly thick screw in, then using pliers, pull it out. I used a decking screw like this one - long enough and wide enough.
Then use a screwdriver to gently knock the remaining bit through - being careful not to dent the outer skin of the door. You can get it out when you take the door skin out.
Then you push the window up to the closed position and duct tape it over the door frame. It helps if it's not raining when you do this...
When it's time to put it back together, before you put the door skin back in, put the outer part of the plug in first, then push the inner bit in a little, then use plumbers' grips to put even pressure on either side, so it's like this.
Now put the door skin back on, bolt it in, reattach the window motor, and then take off the duct tape, lean out of the window and push down hard on the glass. You'll hear it (and feel it) clunk into place.
Taking apart my old door and finding out that it's actually quite straightforward took a lot of the fear out of it, and I'm much less nervous about doing work in the rear doors now.
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