Terry, the answers are yes, the ejector feature can be retained; yes/no/maybe it may possibly bind enough to prevent full snappy ejection; and no it won't cause any lack-of-support problems unless an incompetent does the work.

However I figure that there's a reason why no one seems to have done this before, or at least I personally have not seen any evidence of it so far in examining many a Winder conversion. Sounds like A Good Idea however.
Regards, Joe

You can lead a man to logic but you can't make him think. NRA Life since 1976. God bless America!