I have not, but there is a thread here where someone did a couple years ago.
He said he took the idea of the gen2 trunk mod and sent it to Tiger Racing, they then made him their first gen2 undertail.
It seems to work fine, but keep in mind that water and dirt from street riding will get all over everything in the undertail.
It does not seal around the inner undertail in any way at all, therefore it's really only practical for a track bike.
The trashcan mod keeps everything clean and dry from underneath. But, as always, rain water will blow in around the passenger seat/hump and top of the undertail, even on a completely stock bike. Some sort of weather stripping around the top of the undertail/bottom of rear seat/hump is the only way to make the trunk waterproof.