Using:

Nibbios Inflight Map
Reduced Gunner Accuracy
Random delayed Engine Start
Olham's Rivers
(300) BT & FPR Improvements by Panama Red (High Quality)
Facilities + Airfields mods +Verdun, Havrincourt etc (Consolidated Airfields mods)
Oldhat's balloon archie mod
40LM's Ground Season Textures
Arisfuser's loadscreens
JJJ's realistically populated airfields
OldHat's missions

All working fine with no issues, I tried vanilla for two missions and had problems with AI flight lead being retarded so that didn't last long (Nor did he), My new flight lead flew at a nice steady 80mph TAS until his engine conked. At first I thought "Oh no, here we go again..." but then I realised that he was going to make a forced landing! (Sorry Pol I just can't do vanilla. I like landing and seeing those dudes walking their dogs and reading maps while pointing gallantly at non existent things in the distance, and when will those 4 chaps ever manage to actually push that kite back into the hangar??? They've been at it for years now and not gained a single yard!)

The skies are bloody busy in PE, I got bombed by Caudrons on takeoff, met all sorts of kites going every which way over the Battle of the Somme, shot down an FE-2b and then some other cheeky Caudron got chased off by my escorting Eindeckers when I was on the ground. On top of that a whole lot of lunatics were blowing things up down in the mud non stop. I don't see what they get out of it, nlown up mud is just blown up mud, no matter how much more blown up you add to it. Take the day off I say and work on your elbow bending exercises at the bar.

Interestingly I had to turn down settings to get a smooth 60 FPS in vanilla due to stuttering and 10-20 FPS lost (This was over Alsace, APR 1916) but with the BT mod enabled I could crank everything back up again (Over Flanders JUN 1916 during a very busy battle with 3X the aircraft at least)