The designer's not to blame - it's the writer of the instructons who needs to come to an inhuman and lingering medieval style end.
Helped to fit some to a friends bike a few weeks back. After 3/4 hour we decided the instructions needed to go in the recycling bin. A cup of tea and another 1/2 hour later they were on, another 15 minutes the stays were cut to length and they were back on and look set to stay that way, but we did need a non-SKS bolt out of my box to complete it.
Stays - measured in the trial fitting, cut in a vice using a hacksaw, and plastic bits fitted with added araldite after final fixing of the guards.
The instructions doubled or more the time taken from what it would have been if they'd been left out of the pack in the first place.