Fitting a Velux blind to a modified window
I've now fitted the blind, and both the top piece and the side rails needed to be removed.


the top part was replaced by the blind cartridge, which fits flush to the frame
the side rails, while narrow enough to allow the new rails to be fitted, fouled the inside edge of the blind cartridge.


In the end all three parts were easy to remove as they had been fitted with short nails which pulled free of the frame with little force.