Paul, did you read of the horror stories with Orion UK that have been happening in the past couple of years???? Myastroshop here in Aus dropped them completely as they refused to work on a VERY sub-standard scope. Various interferometry sites on the web are reporting Strehls of as low as 0.5...to the point they cannot even measure a reading on them because of the "swept polish".
http://www.ssmassey.com/reviews/ODK10-review.htm
Can you withdraw? Is it worth it to take a crap-shoot?