To serve the needs of our European (and other 21st century) fans and friends, we have created a metric (SI) version of Bulletproof Blues! It has been added to the download for Bulletproof Blues on DriveThruRPG, so if you have one Bulletproof Blues, you have them all!

http://www.drivethrurpg.com/product/111639/Bulletproof-Blues?affiliate_id=43463

Should you spot an error or omission in our metric conversion, please let us know.