Hello there, I have just aquired a Singer 45K92, rust and seized up. I was able to get it going, after a lot of soaking/dismantling and abit of lightly hammering, it is now completely free. I did a quiche respray job, still putting it back but the balance wheel wobbles when I turn it, I believe it must have had a serious drop to bend the main shaft (not sure of the correct name). Is there where I can source one. How difficult is it to disassemble the main shaft for replacement. Thanks much