Using the {Up Down Left Right Front Back} notation with clockwise
normal and ' (single quote) indicating counter-clockwise:
(B D)^7 that's right, 14 moves. this sets the back face
up and does a couple things to the front.
The next two are general tools to play with three corners
and nothing else, and people should play with them for
their utility.
(L D L') U (L D' L') U'
This fixes front upper left, which leaves front
upper-right, lower-right, lower-left. At this point I
would rotate the entire cube CCW about the front-back
axis so that these become front upper-left, upper-right,
and lower-right, in which case the following transform
becomes (in the new coordinates)
U' (R' D' R) U (R' D R)
but in the old coordinates, we get
R' (D' L' D) R (D' L D) (+ 14. 8. 8.) ==> 30.
I don't think I made a mistake. Have fun.
IF: Plummer == 2*Christman
THEN Christman=14 (must be even)
and also Plummer=28.