Soyuz relocation -- why, exactly?

"John Wilcock" wrote in message
...
As it appeared on the downlinked video, his
transfer to the Soyuz BO module through the tight hatchway in the
pressurized Orlan seemed to require active pushing by CDR Foale, himself
remaining unsuited. Russian specialists are now assessing the test and
are expected to develop conclusions and further plans, which could
include a relocation of the Soyuz to the roomier FGB nadir hatch.

This indicates that there is a good reason to relocate the Soyuz before an
EVA, even with a two man crew. However, I'm not sure why the SP&D hatch on
FGB nadir would be any "roomier" than the SP&D hatch on Pirs.

Jeff
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