1) Follow Ozzy instruction regarding the lead
2) Borrow or buy a different cartridge for comparison
3) Assess your phono stage and amplification
I doubt very highly that your issues are table or arm related. Having experience with the Spacearm, I have no clue how rising the arm had anythign to do with more freedom of the brass cylinder, but as long as it works.
I have one more suggestion, and I mean this to be helpful. Find someone local who is experienced with arm/cartridge setup. Ask them to go through with you the process step-by-step. Even if you have to pay someone to do this the first time, it is worth the experience in the long run. Alternatively, find one of the many link that go through the process in detail and practice.