The only other difficulty was installing the blind holders, as the window frames were made of very old hardwood. I'd brought a rechargeable power screwdriver, but had forgotten the charger. Installing the screws through the plastic holes of the blind holders is often best done by hand, with a manual screwdriver, so I pre-drilled the holes. The drill was hot by the time I finished.
Pre-drill a hole with a bit that's a little smaller than the screw provided with the blind holders.
Even after pre-drilling, it still took some effort to screw the woodscrews in by hand.
Here's a tip from my great-grandfather to make this job a little easier: rub the screw against a bar of soap before inserting in the pre-drilled hole and tightening.