Very enjoyable (April 4 2007) Mystery Music Killer Ruud. Tried an obvious way to get the info for the cage sums - got n1 to sum to "45" but not n3 or n25. Turns out different sources have different record collections - just have to find the Ruudiculous one .
Extra Easter eggs for Para too: he read the instructions and I didn't - another bad mistake (actually: just ignored them tut-tut-tut).
BTW - a fun Killer too.
Spoiler: extra info in tiny-text.
A. It's time
B. The Return of the Space Cowboy
C. Back to Basics
D. Not too Late
E. Universal Mother
F. Tidal
G. Exciter
H. Justified
I. MACHINA/The Machines Of God
J. Life
K. (What's the Story) Morning Glory
L. Live from the Milky Way
M. Eyes Open
N. Electro-Shock Blues
O. Post Orgasmic Chill
P. The Fat of the Land
Q. Once Again
R. Life in Cartoon Motion
S. Mezzanine
T. Home Movies
U. Acoustic Soul
V. A Bigger Bang
W. Parklife
X. K
Y. Whatever People Say I Am, That's What I'm Not
Z. Things to Make and Do
$. Apparently Unaffected
&. OK Computer
#. Piece by Piece