Trumpy, given the opinions expressed in the thread, my post was only intended as a bit of information regarding how one regulatory safety agency viewed the issue, and was not meant to reflect my opinion (or that OSHA - which has relevance to work sites - has any authority in this situation). I should have been clearer in the post, and I never argue against the wisdom of minimizing potential differences (although implementation practicality vs real world risk can be a temptation).
