I know just how you feel JA, I too have one of those horrible cheap flimsy Chinese 6×4 bandsaws.
Dont know why I put up with for the last 20 years, maybe because it just keep working, no matter what I feed into it.
4" round, 6×4 R,S,J, 3"X3" sq ect,ect, all the same and as for being reliable ! that,s a joke. No matter what I do, it will not cut off square, neither will the blade fall off.
I think I must have got a real dud, a Monday morning job.
PS Just asking, why did you keep it for 17 years ? If it gave me that much hardship, I would have dumped it long ago.