this is probably a common problem: when i am switching attachments my one locking lever on the bobtach will not line up the the attachments guide holes, i find myself putting a piece of rod dohn the bobtach holes to rock the pin over so the lever will slide down and make its way through the tach and attachment plate to secure it? i see there is a spring/bolt in their, what is the most common problem that causes this Thanks in advance Ryan