I bought a 30 inch mezz 3/8-10 ignite shaft from mezz usa. I have 4 cues that have the 3/8-10 pin, 3 of my cues the pin is to big to screw on and the other cue it won't screw alway down. Is 3/8-8 a thinner pin from mezz? I'm thinking this shaft was labeled wrong? Thanks Louie