problem with oracle alexandria turntable

for some reason, the platter on my oracle is cock-eyed when rotating, and so scraping on base. have tried a number of differint ways of adjusting the screws in the three adjustment "poles"----unit was out of comission for awhile during some work in house.

not sure if I need to take into a shop for work, or I simply don't know what the hell I'm doing---bought unit used ten years ago, and have no brochures, etc. I'm clueless in regards to above. Any help would be appreciated.