Steve--not to cause a let's jump on Dave thread (me) but SGY made the decision to just leave certain makes alone because of inconstancy in the actions as well as there was just not enough demand for custom work that included accuracy (making jigs and fixtures etc) as a primary requirement after all "the only interesting rifle is an accurate one" and the term "accurate" varies from person to person.
After getting involved in competitive shooting and being mentored by Speedy among others my definition of "accurate" is probably on the more extreme side meaning that if a sporter for example will not shoot .25 MOA it does not meet my definition of "accurate". Sure it involves much more than just the rifle however, it is something that I find very fun to do meaning the entire process including measuring bearing surfaces of each bullet for example.