New Special Airworthiness Cert -- what goes into it?

From the Designated Airworthiness Representative's perspective, just
what goes into getting a new Special Airworthiness Certificate,
Experimental Exhibition/Racing, for a glider?

I spoke with a DAR in Phoenix yesterday and explained to him that I
have a brand new glider, now registered with the FAA, it has a factory
flight test and Export C of A from Germany, and I need the C of A
described above. He told me that because it was *experimental*, there
was a whole lot more work for him to do, a lot of information
gathering and paperwork, and it would cost $650, instead of the $200
he first quoted for a standard C of A.

I thought this would be a simple inspection and a little paperwork,
not more than 1 or 2 hours of their time. What am I missing? (Or, what
are they missing?)

~ted/2NO