never used B/boys, but did use tricity... bought a rear bumper for a superbird.. 1st one sent was wavy on the top portion...sent it back...the 2nd was wavy on the bottom portion... back it went... the 3rd bumper was 'ok'... not 100%, but pretty close..

all had hammer marks on the backside... should have sent them the one off the bird which was/is a perfect core... not a hammer mark....