5,184 Rubidium Surprise Major

Donald F Morrison (no. 5989)
 23456   W  M  B  H
 62534   -  2
(62345)  -     -
(62453)  -     -
 24563   2        s
 54326   s  -
(54623)  -  s  -
(45236)  s     -
 34256   -         
Repeat twice.

Contains 15 56s, 9 each 65s, 7658s and 8765s off the front, 6 5678s off the front, and back rounds.
Also true to Vallium.