Just got my superbell I beam axle in and batwings/hairpins. The batwings seem to be too tight to go over the perch on the axle. Is this because of the chrome on the axle and batwings? Looks like I could maybe force them on with a rubber mallet, but I dont want to screw up the chrome only to find I have the wrong part. Is it normal for the batwings to be really tight?