GTO 52 feed board

How can any raise/lower feed board of gto52 -there are some bolts under the table but could someone point me where and what is the proper setting? I`ve noticed that when i feed paper that tends to curl downwards swing arm hits paper and feeds misaligned, so my thought is if i raise a notch feed table this will stop.
Also the setting of sidelay touching down -there is a bolt that touches a metallic bar, should it be tight on bar or not?-, when i switch to O.S., i hear a thump when sidelay touches down but not from D.S.

Thank you in advance

 

Assuming the swing gripper is set correctly and the front lays are set correctly, the feed table is set so there is a gap between the bottom edge of the front lays and the top of the feed board of .45mm. This is done with the 4 bolts under the feed board. The bolt on the side guide should not be touching the rail. Usually I set this gap to .5mm.

 

Thank you ex, i assume those 4 bolts raise the board from 4 points and they have to be swung same rotation as to get a uniform raise?