5,184 Spliced Surprise Maximus (3 methods)

Donald F Morrison (no. 6991)
 23456   M  W  H
(53462)  s  s     BBB.Y.
 42365   -     s   BZ.ZBB.
Repeat eleven times, calling -
for s half-way and end.

Contains 3,456 Bristol, 1,152 Zanussi and 576 Yorkshire, with 48 changes of method.
If preferred, Cambridge may be rung for Yorkshire throughout.