I am also in the ender boat.
95% of my problems went away when I took the thing completely apart (like, further apart than what it comes in the box), and rebuilt it from scratch, making sure every bolt was tight, every moving part was free,corners perfectly cornered, etc.
I think it had just enough factory misalignment and loseness in a few key areas that compounded to cause me tons of headaches.
That, plus a few cheap upgrades (steel bed and better bed springs) really erased almost all the mechanical issues.