I have just downloaded all the pdf files from the site, there are no instructions for actually adjusting
the triggers. They do state....."call us before adjusting".
I am pretty sure you can get the pull weight down to where it should be, but I understand your frustration. If I am understanding you correctly, The e-mailed
instructions wouldn't open or download??
Seems like I remember seeing in an older post which screw was what.
Perhaps another call to RB and they can simply tell you which screw is which, or try sending you the instructions in another file type or compressed.??
I haven't had a chance to look for the instruction that I might have yet.
In the meantime, this may help:
Remington 700 Rifle Basix trigger adjustment