On 3/30/2011 11:20 PM, Tuno wrote:

The reason I'm asking is that when I went to the local gliderport
yesterday to get a cockpit checkout in the LS-8, the on duty CFI
declined to sign an endorsement conducted by someone else,

I would have, and have in the past, endorsed a pilot for a glider type
that I have never flown, IF the actual check out was done by a pilot
that I knew to have extensive experience in type and if I was present
while it was being performed. I learn something too. As others have
said, it's an insurance company requirement.

Tony V.