Here's the offline gunnery practice terrain you asked for.
I'll have to update this from time to time before AH3, then with AH3 because the directory paths will change. The file is a 7zip self extracting file.
1. - Download to your C:\Hitech Creations folder.
2. - Execute it, and when asked where to extract, change to C:\Hitech Creations\ Aces High Beta
Download link: http://www47.zippyshare.com/v/eu34o2zE/file.htmlI've added an updated B-25H gunsight (usaN3B57mm) with range marks to 4000yds. If you raise the gunsight up until the small tick mark below the 4 just shows. The CV will fit nicely inside of the width of the gunsight glass at 4000yds. You can shoot 5000yds by aiming with the top edge of the gunsight's barrel body where the projector lens is.
You will have 10x ammo set for planes except for the 75mm. A Hitech restriction. The minimum fuel burn so you only need 25%. Increased icon range. AP ammo will not destroy the tanks but, makes a really nice explosion when you hit them. If you want most of the common objects like the field guns and ships to come back up in 2 minutes. Go into the arena setting for objects where the time down and pounds of bombs to destroy an object is. Press the load button, I included a file that will change those values. You will have to do that every time you open this terrain.
The important wirbel spawn to shoot at the drones is at A1 NW. All other spawns, just click on them in tanks, planes and PT to find out.
A1 N GV spawn is onto a 4 mile long tank range with a 17lb and 88 on the firing line. V7 N GV spawn is onto a 4000yd tank range with a 17lb and 88 on the firing line.