When I was doing my third solo circuit during training in a C152 I had the seat go rearwards on me during the climbout almost immedietley after takeoff.
To say this came as a surprise was a complete understatement and scared the life out of me. I had to level at 300' and put the nose down to enable me to get the seat forward again.
I don't know about this mod but I make it my business to ensure my seat is fully latched and there is no way it could go back on all my flights now.