bosch p7100 pump adjustment

i'll start with the questions in case the hasty want to skip the whys.

on the back afc housing, (firewall side in my case) there is the pre-boost screw. what direction do i adjust this, in or out, and what does it do?

on the top of the afc housing, behind the 8mm allen plug is the star wheel. what direction, how much?

i've heard on other forums something about fuel plate modification, also some place said to remove it entirely. idk what or where that is.

this is on a 95' international 4800 with dt466 motor. this is a bucket truck, i.e. lots of idle time. i cannot sacrifice any functionality in that respect. my goal is to create additional towing power without the need for any or for very few additional modifications. not for financial reasons, but just because i don't want the hassle of the initial modification or subsequent un-modification in case i sell it and someone doesn't want my changes.

its an automatic transmission so the problem i have is that between 40mph through about 50mph, it bogs down something serious, to a much higher degree while towing anything, even something very light (2k lbs). i think that it will not even make top speed with a 10k lb load, which is my goal. god forbid you have to slow down during this time and its even worse since you lose whatever boost you have built.

i've already fiddled slightly with the 2 adjustment screws i mentioned above but my lack of knowledge prevents me from doing too much without more research