Setting Infinity on a Linhof 6x9

[davidmknoble]

As I am new to the bellows and view camera style, I am trying to set the infinity stops on a “Baby Linhoff” 6x9cm system. I was using a 90mm lens and thought I was close, but after developing a roll of film it is clear inifinity is a little out of focus. I used a magnifier on the ground glass, but I’m not sure that I have the stops perfectly perpendicular to the focus rails.

Anyone with experience in this I’m all ears!
Thanks.