ok, i got an American Classic Seatpost along with my buildkit. however, the length is way too long and they dont' have anything around 280-300mm lenght for me to trade with.

so now i have this 350mm alu. seatpost that i know for sure will be too long for me to use. so would it be safe to hack of what i don't need, as long as i keep the same lenght for the min. insertion mark?