Eric, here are my personal thoughts. You can accept them, ignore, or accept partially. The main thing is that now everything is very much under your control and you can make decision on your own. Thats about details and tactics. But concerning global strategy change - completely join with WCDF rating system - goes up to ACF Exec Committee.
1. You can use Mr. Buttler formula or WCDF formula, or combination, or any other formula and methods, but ... ACF and WCDF ratings will be always separate and differ from each other and there will be always two separate sets. So - your input should be ACF ratings when Mr. Butler stopped. And everything will be re-calculated from there.
Remember - after years WCDF may be there or not, but ACF is forever
2. Use WCDF rating for foreign players who doesn't have ACF ratings.
3. You can exchange files with Mr. Keder 1-2 times a year. So - it may become a part of official ACF Rating Report showing both numbers: ACF rating and WCDF rating. You can even give a reader an option to resort report base on rating !
4. In my personal opinion the formula which Mr. Buttler used is OK but probably needs to be improved and adjusted for "provisional period"
5. When you will make decision about which formula to use for ACF ratings, along with other things keep in mind one more important consideration: easy maintenance.
BTW. In chess and other forms of checkers/draughts often enough some countries have their National rating and title systems which are different from International. For instance, there is USA chess rating system and FIDE chess rating system.
All for now.
Regards,
Alex
I am playing checkers, not chess.