On Sunday, April 24, 2016 at 10:18:45 AM UTC-4, N97MT wrote:

But I would assume than a Proficiency Check instructor would be more amenable to acting as PIC.

I can ask the one super knowledgeable Light Sport school guy I'm acquainted with, but I'd "assume" that the proficiency checking instructor must be PIC because 1) he/she's NOT a DPE and 2) the applicant is not yet rated in the new aircraft.