I think CBM wrote something about the Redan, no? Like, "Take a green, angle it 45 degrees left, and slope it away from the golfer?" I think that is the essence. And many feel CBM got his at the National more right than the original.
IMHO, reproducing the original concept now means you have to change the contours. Somewhere, a gca made a survey of Redans, and found the original Raynor ones sloped 12% away, and some newer ones were about 6%. Will have to look that one up when I have time. But, I doubt you could do either these days (see Shinny and the US Open where it was so slick the only play was a fade to cancel the cross slope)
The reverse slope needs to be perhaps a max of 5%, and probably less. That said, I have seen good players simply spin the ball harder when the reverse slope is less than 2% or so. At 5%, balls will roll of a fw cut, and at 7% reverse slope, they will just keep running. Somewhere in between, and pray for about constant moisture from the irrigation practices, and you might be about right.
It became fairly popular to copy the Redan, in some part after the ASGCA trip to Scotland in 1980. However, many architects of that period wouldn't build a reverse slope green at all, thus negating some of the Redan concepts.
As someone mentioned, I think most of us, as opposed to expecting a running shot with a draw, because most approach areas just don't allow running, do the Redan as much a choice of flying the bunker toward the pin, or playing safe to the right, perhaps kicking in off the right hand slope . I figure the golfer will fly one perhaps a club or two short of the pin, and use the combo of side and back slopes to trickle the ball to the pin, not really run it in like some of the old ones, i.e., the "safe shot" can get you close to the pin if you have some finesse, not just end up in a bail out zone.
I also question CBM's 45 degree assumption. Seems like 30 degrees works well enough, but then, I am sure it can be concocted several different ways. It's just hard to bend and run a shot to a green that is as wide as it is deep.