very comfy but disappointed with the vinyl after 1-2 years of use starting to split

Not a bad chair, however lower back support is missing.
Solved that with putting a pillow on it.

To tilt pull out the lever (the one for making the chair go up & down).

Like this chair but hubby had to drill metal to make right arm fit (screw holes not lining up) and same as previous feedback from Alan T, can't seem to get tilt to work. Will need to call shop...

I assembled the chair correctly in accordance with instruction pamphlet, but odes not give instructions on operation, lever allows chair to go up and down the tilt knob does not want to work and on lever states "Lock and Free with Arrows but nothing happens? Can someone give me some indications on this?
Very comfortable but does not have too much height!