hello99:Rav Zeff Leff shlita, and the other poskim who similarly pasken one is permitted to copy, are mainstream accepted Chareidi Orthodox poskim. Frankly, I am a bit shocked you implied Rav Leff and the other poskim are “conservative”. The people who copy rightfully do so by following their poskim who permit it.
uneeq: Zeh nehne vzeh lo chaser.