Leaderboard

I'm not so sure about that, I have bought several items and most times i try to get as much info as i can to make an informed decision however nothing turns up. Once i have bought the thing and used it then found an issue googling that provides a bunch of responses that weren't available with earlier queries. I suspect my search terms or the wording is inadequate somehow. I will say i haven't had the the issue the my cheaper sb that you have had, my issues have been different... I did just have a quick look at my m42 takumars, they all look to have slightly different length protrusions from the rear. Theres also 4 types of 50mm takumars from takumars to super takumars and a couple of smc takumars. If you have a micrometer we could do some math and figure out the differences. But that wont solve your problem.