neither do I , but I had this query set up before for someone else, so I ran it.
Will run it for all winners, although I'm not inclined to follow mechanical "systems" or any system for that matter.

here it is

weight same winners S/R 10.37% LOT 32.62%
weight less winners S/R 9.49% LOT 32.07%
weight up +2Kg winners S/R 13.31% LOT 29.19%

Should make you think!

Good luck