Just bought a mustang saddle from I guy I know, he's never used it and sold the bike before he had chance to try it, so I've bought it and it genuinely won't fit! The pin on the saddle seems a mile out and just won't align up with the hole on the bike. It's still under warranty but will they still honor it if it's changed owner or should I contact the original buyer? I just sold my comfort seat which wasn't much better than the std one and they both fit perfect so it's Defo the saddle. What do you Think?