This is mainly a warning to those ordering this item right now or around this time. I believe their manufacturing specifications are off, i.e. the rings I ordered from two separate places (B&H and Adorama) both do not fit my Einsteins (ring is too large). I have ordered this exact same ring about a year ago and it fit perfectly. I have emailed Elinchrom US about this, but I have a feeling I won't be reaching resolution any time soon.
If there are any staff reading this, would it be possible to contact Elinchrom and confirm the manuf. specs with them? Links to photos (via Flickr) of the old and new ring are below. Note the measurements.
Old ring which fits:
http://www.flickr.com/photos/brianpoon/11230987523/New ring which is too big:
http://www.flickr.com/photos/brianpoon/11230910736/