Not sure what discussion you were looking for, but just the day before yesterday I was talking with a co-worker about taking a TD .049 and pulling the venturi body and replacing it with the venturi body from a Medallion .049. Talking to others in the past, the thought is that you get the more aggressive porting of the TD with the better fuel suction of the Medallion. Power might fall somewhere between the two. I've never done it before, but I was ordering parts from MECOA a couple of weeks ago so I ordered and extra Medallion body to do the experiment. Maybe this is what you're thinking of?
Mark