I fitted a screen to a Series 1 FHC in January. It is pretty easy! I was on my own.
It took 40 minutes to get it fitted in the car, 5 minutes to fit the filler strip, the another half hour to fit the top and bottom trim strips, then about 40 minutes to bond the side chromes.
It is not that difficult. Not bragging!
You need some vaseline £2, a new soft windscreen rubber £40, a filler strip fitting tool £10, windscreen rubber hook tool £15 and some black mastick £6 and some ribber suction cups for the side chromes, or another brace to keep them in position whilst the mastic dries overnight.
Happy to tell anyone how to do it if they are a novice.
Rub Vaseline into the glass seating channel all around the rubber. Fit the rubber onto the screen flange on the car. Tap it around the frame until seated properly.
Drop the screen onto the seated rubber make sure it is falling into the correct screen channel, not the channel for the filler strip.
Centralise the screen by looking at the sides. The glass should slide down into the channel with the help of your hands, the vaseline and gravity.
Then you work the rubber around the screen up both sides using the bent hook tool. Be careful not to touch the glass with the hook tool.
Then you work the rubber around the screen towards the center of the car from both sides. Then its in.
You can manipulate the glass, ensuring the whole thing is seated correctly before moving onto the filler strip.
The rest of it will be pretty easy in comparison, so I wont go into the detail unless anyone really wants me to.