There are two types of country in the world; those that sent men to the Moon and back, and those that use the 5-V target. I vote other countries change to 10-X targets; a lot less disruption.
On the other hand, pair firing is neat but some firing lines make pair shooting a "cozy" proposition.
This is kind of funny. How many countries have sent multi million or should that be billion dollars only to have them blow up and kill everyone on board due to not using metric sizing and or getting two systems confused,
