5,010 Spliced Royal (2 methods)

Donald F Morrison (no. 1272)
 23456   M  W  H
 34256         2
 25463   s  s  -
(65432)  s  s
 43526   s  s  -
(24536)     -
 53462   s  s  -
 34265   s     3*
(64235)     s
(42536)  -  2*  
Snap finish.
3* = s - s; 2* = - s.
Ring any 64 leads as Bristol Surprise and
the remaining 68 leads as Maypole Alliance.

One specific possible arrangement:
 23456   M  W  H  Methods     
 42356         -  BBBBBBBB.
 34256         -  MMMMMMMM.
(54263)  s  s     MMMMMMM.M.
 25463         -   BBBBBBB.
(65432)  s  s     MMMMMMM.M.
(35426)  s  s      BBBBBB.B.
 43526         -   MMBBBMM.
(24536)     -     MMMMMMMMM.
(34562)  s  s      BBBBBB.B.
 53462         -   MMBBBMM.
 23465   s        BBBBBBB.B
 24365         s  MMMMMMMM.
 32465         -  BBBBBBBB.
 34265         s  MMMMMMMM.
(64235)     s     BBBBBBBBB.
(32546)  -  -      MMMMMM.M.
(42536)     s      BBBBMMMM.(M)
 

Assuming the final two blows are rung as Maypole, contains 2,560 Bristol Surprise and 2,450 Maypole Alliance.
Contains 19 56s and 17 65s, up to 94 little bell rollups, and from 1 to 129 changes of method, with all the work possible for any number of changes of method. The exact number of little rollups and the number of changes of method depend upon the arrangement of methods chosen.
The given specific possible arrangement contains 94 little bell rollups, 19 changes of method, and is all the work.
Especially suitable length for a tenth anniversary.