Hi,
I concur completely with Larry, having been through this excersize the last months myself.
Did the windshield myself after installing the leather covered dash paddings first.
Used the rope method with lots of glycerine soap to lube and no wood in the way.
Biggest hassle was to get the rubber sel and aluminium trim pieces properly in place before the installation of the WS.
Installing the WS with the wood in the car is possible, but you risk damaging the wood and you have no visual control that the seal
Is properly seated at the bottom when pulling the seal-lip over the edge.
I opted to have all the dash padding professionally done by my German upholstry guy, and it turned out very well.
As some have said, it is very important to have all leather that is used for these parts professionally shaved down, I think the shaved leather was less than half the thickness of the original unshaved hide.
Installed the wood with some protective towels on the dash, and some isolation tape on the screw threads to avoid damage to the leather parts, all went in with no big problems.
Hans