Im getting an Eotech 553 and was curious if its bad to beige the optic across the gap between the upper and the rail. I have heard this can cause problems, but though I would ask here to see if anyone has had experience with the aforementioned optic and situation. Im currently running Centurion arms diopter sights so I don't have a lot of room on the upper. If need be I could change sight but id rather not.