if you feel confident doing it then go for it.
had to do this in the shop i'm in, we sell stunt scooters aswell as bikes queue the boo's, anyway, had to shorten bars on scooters before, same method, drill a hole and cut a slit. drill the hole first though, trying to drill a hole at the end of the slit without the bit jamming is pretty hard.
if you feel confident doing it then go for it.
had to do this in the shop i'm in, we sell stunt scooters aswell as bikes queue the boo's, anyway, had to shorten bars on scooters before, same method, drill a hole and cut a slit. drill the hole first though, trying to drill a hole at the end of the slit without the bit jamming is pretty hard.