Technics SL-1200GR setup question

Hey A'goners,

I recently purchased a Technics SL-1200GR TT and am very pleased with it. I purchased used and it came with a Denon D-110 cart.

My understanding is that when the VTA is properly setup, the tonearm should be parallel with the surface of the record. In my case, the arm tilts down slightly. In other words, it's higher in the back and lower near the cart. The tonearm adjustment is as low as it goes. If I lift up the tonearm to make it level it is probably a good 1/4."

Does anyone have any suggestions here? Is this common or an acceptable degree of tilt? I don't think a shim is going to get 'er done here. 

I appreciate any and all suggestions. 

Thanks,
Joe