Blood Red Skies - Rulers, Range and Compass

My custom Compass, Range Rulers and Movement steppers for the WWII Aerial Combat Game from Warlords; Blood Red Skies; https://store.warlordgames.com/collections/blood-red-skies

Based on my analysis of the Rulers that came with the game, it appears that range is measured from the rear of the base. Also the rulers that came in the game were not accurate (printing errors?) so i created these rulers to replace the inaccurate ones.

Let me know if you have any problems.