Sorry John, "R mod data" I'm not sure what you mean by that.
I've got no data handy for, and never flown, a non-Raisbeck B200 so can't really comment there. I'll believe your figures. Goes to show a King Air with the Raisbeck goodies are better
As for that 35ft, well, can't tell you much more other than that's what it says on the chart, and it wasn't in the section with FAR25 info. Unless certification criteria changed at some stage?