marked the base and pallet at zero to try and see what's going on. when i rotate and bring back to zero the line is out and table is not square. looked closer at pallet change and when new pallet comes in the 'base' shifts back to zero, repeat B movement and line is out again. bring in other pallet and it shifts back to position. something lose under the base? as it's 1 degree increment table guessing it's gears that hold it all in position?