I built 2 of the burn pot collars and now im a bit dumfounded... the first one i built went about 1/2 way up to the shoot and helped quite a bit.. So i got bored again last year and built one that went all the way up to the shoot. Did not seem bad last year seemed to have more jumpers than the smaller one. This year it seems like their is even more... I can sit their and watch them drop and they always drop in when im sitting their.. Can't for the life of me see how their getting out to that extent... they don't seem to be jumping back out..