Ok, how about this then

Initially Gamo compacts at 10m
20 practise shots then shoot 4 cards of 5 shots per card.
Submit individual card scores and a total by the 25th of each month.
As this is a fun thing initially start with just the 4 cards per month.

Monthly high score will be announced and total from 6 months will be pronounced winner. Then start again or modify conditions to suit, maybe look at handicap system if required etc.

As this is an honesty thing and as not everyone can post pictures only text scores need to be submitted unless you feel otherwise.

First cards to be submitted for/by September 25th.

Okay? or changes needed?