The difficulty you experienced was in using the regulator and it's adjustment shims to achieve your goal of "orientation" without your understanding that this was also the primary output pressure adjustment scheme?
Reading the description for the shims shown in the above reply posted by another, I would not suppose they were ment to adjust pressure. Only orientation. (perhaps these are not the only shims available.
I do read in the regulator description that these units are "Shim adjusted".
Did the regulator come to you without useful instructions?
Words are the source of all misunderstanding