Prinsu Toprack on SnugTop Not sitting Flush

Recently installed a prinsu top rack on my snug top and having a hell of a time getting it flush with the cab rack. Even with the adjustable mounting feet, I still can’t get it to sit right. It’s only off by about a half inch but I’m way too ocd to leave it like this. Anyone have any tips on how I can raise the camper shell top rack by about .5 inch?

 

I regularly carry material on top, boards 12' long etc..., look at first 2 bars above cab, I remove one bolt and rotate 90°, the rack is level front of cab to rear of top.

 

I made custom aluminum spacers for mine to get it perfectly level with the cab rack ie: custom cut thick washers